Practice Test

Q1) Plants and animals living in a given area constitute: Show Answer

Q2) Carrying capacity of an environment is determined by: Show Answer

Q3) Parameter for describing a population is: Show Answer

Q4) The human population first began to grow exponentially at the time of: Show Answer

Q5) The growth of human population is most rapid in: Show Answer

Q6) What constitutes the most important boundary between different species? Show Answer

Q7) Population density is expressed by: Show Answer

Q8) Fingers and legs are shorter in colder regions. It is: Show Answer

Q9) Population whose members reproduce asexually are termed: Show Answer

Q10) Population whose members reproduce sexually are termed: Show Answer

Q11) The study of interactions of an individual organism or a single species with the living and non-living component of its environment is: Show Answer

Q12) All the living organisms on earth constitute: Show Answer

Q13) Individuals of the same species in a particular locality constitute: Show Answer

Q14) Migration refers to: Show Answer

Q15) Gametophyte and sporophyte stages of a fern plant should ecologically be considered as: Show Answer

Q16) Competition is most severe in two: Show Answer

Q17) Which of the following shows the polymorphism? Show Answer

Q18) Cross-fertilization in plants is a kind of: Show Answer

Q19) An interaction between two or more organisms when the resource necessary for them are limited, refers to: Show Answer

Q20) Sub-groups of a population capable of interbreeding are called as: Show Answer

Q21) The carrying capacity is determined by its: Show Answer

Q22) A population can grow exponentially: Show Answer

Q23) Which of the following does not directly affect biotic potential? Show Answer

Q24) Term species in ecology refers to: Show Answer

Q25) The levelling of an S-shaped curve describing population growth is caused by: Show Answer

Q26) The abundance of a species population within its habitat is called: Show Answer

Q27) Mule is produced by breeding: Show Answer

Q28) When population reaches carrying capacity: Show Answer

Q29) Crow also incubates the eggs of: Show Answer

Q30) Population density of aquatic organisms is expressed in terms of individuals per: Show Answer

Q31) Which of the following factors is not determinant of population size? Show Answer

Q32) The dominant individual in a herd is: Show Answer

Q33) Which of these helps in the survival of a species? Show Answer

Q34) Emigration affects population in: Show Answer

Q35) The members or a form of polymorphic species: Show Answer

Q36) The aggregate of processes that determine the size and composition of any population is termed as: Show Answer

Q37) When a tiger attacks cheetals, the stag with best antlers is surrounded by other individuals to protect it. It is an example of: Show Answer

Q38) The factor which does not affect the population size is: Show Answer

Q39) Rapid decline in a population due to high mortality rate is: Show Answer

Q40) Which of the following chemical compound helps in transmitting the message to other members of the same species? Show Answer

Q41) The population tends to increase as individuals are added by: Show Answer

Q42) The population tends to decrease by: Show Answer

Q43) The most distinct and easily observation unit is: Show Answer

Q44) Human society is a product of: Show Answer

Q45) Which of the following morphological forms is also known as ecophenes? Show Answer

Q46) The relationship between one species and another within a community that has evolved through interactions is based upon: Show Answer

Q47) The interaction among organisms in a community called as biotic factors influence: Show Answer

Q48) According to the species equilibrium theory, smaller island have fewer species because they have: Show Answer

Q49) Competition between individuals of the species is called: Show Answer

Q50) Which of the following levels of organisation emphasizes the structural aspects in terms of relation and requirement of organisms? Show Answer

Q51) Synecology is study of: Show Answer

Q52) Halophytes growing on mud are called as: Show Answer

Q53) Euhalophytes grow where the concentration of NaCI ranges: Show Answer

Q54) Members of biological species are potentially able to: Show Answer

Q55) Which of the following niches is concerned with the trophic position of an organism? Show Answer

Q56) The keystone species in an ecosystem are those which: Show Answer

Q57) The sphere of living matter together with water, air and soil on the earth is called: Show Answer

Q58) Plants with irreversible and genetically fixed adaptations are known as: Show Answer

Q59) Species which has a restricted distribution is called: Show Answer

Q60) Study of communities, especially their environmental relationship and structure, is known as: Show Answer

Q61) When the organisms live together in such a manner that one organism is benefited while the other remains unaffected. This type of association is called: Show Answer

Q62) The part of earth and atmosphere supporting life is: Show Answer

Q63) Number of immigration is more than emigration and death is lower than natality. Growth curve of population will show: Show Answer

Q64) Percentage ratio of natality over mortality is: Show Answer

Q65) Human population shows: Show Answer

Q66) The process of mating of individuals which are more closely related than the average of the population to which they belong is called: Show Answer

Q67) Adaptation of a species is its: Show Answer

Q68) Asymptote is a stage when a population is: Show Answer

Q69) Two species cannot occupy the same niche. This law is known as: Show Answer

Q70) Broad-leaved forest oak are found in: Show Answer

Q71) Prolonged liberal irrigation of agricultural field likely to create the problem of: Show Answer

Q72) There exists a close association between the alga and the fungus within a lichen. The fungus: Show Answer

Q73) Identify the correctly matched pair: Show Answer

Q74) Sunderban contains mainly: Show Answer

Q75) Pneumatophores are present/common in: Show Answer

Q76) Which one of the following correctly represents an organism and its ecological niche? Show Answer

Q77) Humidity in atmosphere decreases rate of: Show Answer

Q78) Niche overlap indicates: Show Answer

Q79) Annual migration does not occur in the case of: Show Answer

Q80) Geometric representation of age structure is a characteristic of: Show Answer

Q81) Which one of the following is categorised as a parasite in true sense? Show Answer

Q82) Consider the following four conditions (a-d) and select the correct pair of them as adaptation to environment in desert lizards.
The conditions:
(a) Burrowing in soil to escape high temperature
(b) Losing heat rapidly from the body during high temperature
(c) Bask in sun when temperature is low
(d) Insulating body due to thick fatty dermis Show Answer

Q83) The ecological levels of organisation in terms of complexity are arranged in the order: Show Answer

Q84) The role of an organism in the ecological system is known as: Show Answer

Q85) The kangaroo rat and camel adapt to dry and hot conditions in the deserts by: Show Answer

Q86) Adaptation to low temperature and freezing in animals occurs due to the production of: Show Answer

Q87) Which of the following are important components of environment? Show Answer

Q88) Who is regareded as father of ecology in India: Show Answer

Q89) The word ecology was given by: Show Answer

Q90) Which of the following is correct order of biological organisation ranging from organism to biosphere? Show Answer

Q91) The basic unit of study in ecology is/are: Show Answer

Q92) What is landscape? Show Answer

Q93) On the basis of variation in mean temperature along latitude, the temperate climatic region is at: Show Answer

Q94) Ecological niche of an organism represents: Show Answer

Q95) Temperature decreases with increasing height in troposphere upto: Show Answer

Q96) Phenology refers to the timing of season activites of plants in relation to changes in environmental condition. In many animals, migration, hibernation and reproductive behaviour are controlled by: Show Answer

Q97) The limnetic zone is: Show Answer

Q98) Which of the following is an example of physiological xerophyte? Show Answer

Q99) Ecology is basically concerned with four levels of biology organizations. These levels are Show Answer

Q100) Which of the following accounts for the formation of major biomes? Show Answer

Q101) A regional ecological unit having a specific climate is Show Answer

Q102) Major biomes of India include Show Answer

Q103) What are the key elements that lead to so much variation in the physical and chemical conditions of different habitats? Show Answer

Q104) False statement is Show Answer

Q105) Select the false statement Show Answer

Q106) A few organisms can tolerate and thrive a wide range of temperature. Such animals are called _______. A vast majority of animals are restricted to a narrow range of temperature. Such animals are called ______. Show Answer

Q107) Snow leopards are not found in Kerala forests. Which factor is responsible for it? Show Answer

Q108) Next to temperature, which is the most important factor influencing the life of organisms? Show Answer

Q109) Life Show Answer

Q110) Each of the following is an important factor in determining the productivity of fresh water lake except Show Answer

Q111) Which of the following is not a part of an organisms physical environment? Show Answer

Q112) Which of the following statements is false? Show Answer

Q113) I. Organisms living in oceans, lakes and rivers face water-related problems.
II. Euryhaline can tolerate a wide range of salinities.
III. Stenohaline are restricted to a narrow range of salinities.
IV. No fresh water animals cannot live for long in sea water but sea animals can live in fresh water for long times because of osmotic balance.
V. The salt concentration is less than 5% in inland water, 30-35% in sea and > 100% in some hypersaline lagoons. Show Answer

Q114) Which of the following might contribute to determining an organisms habitat? Show Answer

Q115) The location of terrestrial biomes is strongly influenced by Show Answer

Q116) The two sides of a given mountain have the same latitude and altitude. Are they likely to have the same climate? Show Answer

Q117) Seasons are influenced by Show Answer

Q118) In regions of hot temperatures and wet climate, you will most likely find ______ biomes, whereas in the regions of hot temperature and dry climate you will find ______. Show Answer

Q119) The ultimate source of energy for all ecosystems on earth is Show Answer

Q120) Animals having a built-in thermostat to maintain constant body temperature are Show Answer

Q121) Which of the following statements is false?
I. Light is essential for life to exist on the earth.
II. Many species of small plants under the canopy to tall trees in forest show optimal use of available light due to having large sized antenna and higher number of thylakoids.
III. UV-rays are not harmful for many organisms.
IV. Photoperiodic requirement is essential for many plants for flowering.
V. Sun is the source of light and temperature on land.
VI. Red algae can live in deep sea water because of having pigment, phycoerythrin. Show Answer

Q122) Deep (> 500 m) in the oceans inhabitants are not aware of existence of a celestial source of energy called Show Answer

Q123) The nature of soil in a given area is independent of Show Answer

Q124) Find out the false one Show Answer

Q125) Percolation and water holding capacity of soil is dependent upon Show Answer

Q126) To a large extent, the vegetation of an area is determined by Show Answer

Q127) Which of the factors dictates the types of animals in a habitat Show Answer

Q128) Which of the following factors often determine the type of benthic animals that thrive in aquatic environment? Show Answer

Q129) Which of the following term implies the maintenance of relatively constant physical and chemical conditions within organisms? Show Answer

Q130) Human can maintain homeostasis through Show Answer

Q131) Which of the following statement is false? Show Answer

Q132) I. Thermoregulation, osmoregulation and excretion are mechanisms that moderate change in the body.
II. 99% animals and almost all plants are confomers.
III. Heat loss or heat gain is a function of surface area.
IV. Thermoregulation energetically is least expensive process for many organisms like shrews and humming birds.
V. 99% animals are thermoregulators.
VI. Archaebacteria cannot tolerate high temperature. Show Answer

Q133) Why small animals are mostly not found in polar areas? Show Answer

Q134) I. Conformers are the organisms that cannot maintain a constant internal environment.
II. 99% animals and nearly all plants cannot maintain their constant internal environments.
III. During the course of evolution, the cost and benefits of maintaining a constant internal environment are discarded.
IV. Conformity is a condition in which an external challenge induces parallel internal changes.
V. Regulation is a condition in which external challenge elicits compensatory action to maintain the internal environment. Show Answer

Q135) Which one is correct?
I. In a hot climate reptiles can maintain a constant body temperature in the day by behavioural regulation.
II. The body temperature of thermoconformers changes with ambient temperature.
III. In aquatic osmoconformers, the osmolarity of body fluids changes with that of ambient water.
IV. Small animals have a larger surface area relative to their volume, therefore tend to lose body heat very fast when it is cold outside, then they have to expand much energy to generate body heat through metabolism. Show Answer

Q136) Whales, the world's largest living mammals, live in the ocean, but there are no very small aquatic mammals why? Show Answer

Q137) Kangaroo rats Show Answer

Q138) Which of the following is an important adaptation of animals to cold climate Show Answer

Q139) Elephants use their ears to dump heat to the environment. What mechanisms might they employ to increase heat loss from ears? Show Answer

Q140) Find out the false one Show Answer

Q141) I. Basking by desert lizards in sun.
II. Hiding in burrows by some animals.
III. Wearing of woolen clothes.
IV. Thermal gaping.
The above are examples of Show Answer

Q142) Choose the odd one w.r.t. adaptations in the organisms Show Answer

Q143) Symptoms of altitude sickness include all except Show Answer

Q144) Acclimatization (compensatory mechanisms) to altitude sickness includes all except Show Answer

Q145) Organisms have evolved various mechanisms to maintain homeostasis to perform its physiological and biochemical functions. This can be obtained through Show Answer

Q146) Keoladeo National Park (Bharatpur) hosts thousands of migrating birds from Siberia and other extremely cold northern regions. This park is located in Show Answer

Q147) Adaptation is an attribute of organisms that enables them to survive and reproduce in their habitats. Adaptation Show Answer

Q148) The Kangaroo rat in North American desert do not drink water. How does it survive in such xeric condition Show Answer

Q149) Which of the following statement is false w.r.t. adaptations? Show Answer

Q150) Which of the following is false? Show Answer

Q151) If in a pond there are 20 lotus last year and through reproduction 8 new plants are added, taking current population to 28. The birth rate per year is Show Answer

Q152) If 4 individuals in a laboratory population of 40 fruitflies died during a specific time (a week) interval, the death rate in the population per week is Show Answer

Q153) Population density of terrestrial organism is measured in terms of per Show Answer

Q154) Population density of aquatic animals in some waterbody is measured in term of per Show Answer

Q155) Density of a population (D) is Show Answer

Q156) Total number of individual of a specific in an area is called Show Answer

Q157) In an area, there are 200 Parthenium and a single huge banyan tree. Which of the following conclusions is correct Show Answer

Q158) Birth rate is 100, death rate is 10. Number of individuals in population group is 1000. What is the percentage of natural growth rate? Show Answer

Q159) The age distribution of a population is determined by Show Answer

Q160) Parameters related to age structure include Show Answer

Q161) The age structure of a population is its Show Answer

Q162) The reproductive value of an individual is greatest Show Answer

Q163) If most individuals in a population are young, why is the population likely to grow rapidly in the future? Show Answer

Q164) What four factors define population growth? Show Answer

Q165) Size of population can be decreased by Show Answer

Q166) Which of the following is not a factor that would limit the growth of a population? Show Answer

Q167) A population of 100 individuals has a doubling time of 25 years. What size will this population be in 100 years? Show Answer

Q168) Which of the following statements is correct? Show Answer

Q169) Allen's rule is related to Show Answer

Q170) For which of the following cases, population density can be easily determined by utilizing non-biological parameter? Show Answer

Q171) Population growth of a species is not related to which of the following parameters? Show Answer

Q172) Which of the following can be a limit on population growth? Show Answer

Q173) Assuming that an animal generates heat at a rate proportional to its volume and can radiate heat at a rate proportional to its body surface area. Which of the following would be best at maintaining its body temperature in a cold climate Show Answer

Q174) Exponential growth occurs when there is Show Answer

Q175) Logistic growth occurs when there is Show Answer

Q176) As the number of individuals approaches the carrying capacity of a population, which of the following is predicted by the sigmoidal growth curve? Show Answer

Q177) Organisms with very high intrinsic growth rates have Show Answer

Q178) A population with a larger proportion of older individuals than younger ones will likely Show Answer

Q179) What is the fate of a population that is dominated by younger individuals and lacking older individuals? Show Answer

Q180) Biotic potential refers to Show Answer

Q181) Periodic departure and return is known as Show Answer

Q182) An "Urn" shaped population age pyramid represents Show Answer

Q183) A behavioural strategy of adaptation is called echolocation is found in Show Answer

Q184) Which is not related to S-shaped population curve? Show Answer

Q185) Which of the following is correct? Show Answer

Q186) I. In a population growth rate curve the lag phase represents the period when a population is adjusting to a new environment.
II. In a population growth rate curve the steepest part of growth phase represents the period when a population is growing exponentially.
III. In the stationary phase of a population growth rate curve the population is in dynamic equilibrium.
IV. Human have changed the carrying capacity of the earth.
Which of the above statements are correct? Show Answer

Q187) Which of these is an explanation of why a population can fluctuate once it has reached carrying capacity? Show Answer

Q188) Which is not an assumption for logistic growth? Show Answer

Q189) If B = 0.55, D = 0.45 and N = 1000, then dN/dt = ______ . Show Answer

Q190) Choose the correct option Show Answer

Q191) Which of the following is true concerning exponential growth? Show Answer

Q192) The population growth equation describes a population that Show Answer

Q193) The growth rate of a population in an unlimited environment Show Answer

Q194) Which of the following is not an assumption of the logistic model for population growth? Show Answer

Q195) Which of the following is true for the carrying capacity (K)? Show Answer

Q196) Scholars caught, marked and released 80 fishes in a pond. Later 100 fish were caught at random. 40 of them were marked. The number of fishes in the pond is Show Answer

Q197) A broad-based, pyramid shaped age structure is characteristic of a population that is Show Answer

Q198) A population grows rapidly at first and then levels off at carrying capacity of it is Show Answer

Q199) Carrying capacity for a population is estimated at 500; the population size is currently 400; and rmax = 0.01. What is dN/dt? Show Answer

Q200) A country that has a stable population is characterized by an age structure that is _______. Show Answer

Q201) Some organisms reproduce only once in their lifetime because they Show Answer

Q202) Darwin judged the fitness of an individual in term of Show Answer

Q203) I. Populations evolve to maximise their reproductive fitness, also called Darwinian fitness (higher r value), in the habitat in which they live.
II. The population growth rate r is inversely related to generation time.
III. The housefly, which has a short life-span and produces a large number of eggs, could be considered as a low r max species.
IV. Under a particular set of selection pressures, organisms evolve towards the most efficient reproductive strategies.
V. Life history traits of organisms have evolved in relation to the constraints imposed by biotic and abiotic factors in their habitat.
Select the false statement Show Answer

Q204) Which one is true? Show Answer

Q205) Which one of the following is incorrect? Show Answer

Q206) Choose the odd one out w.r.t. parasitism Show Answer

Q207) Which of the following is correct about host-specific parasites? Show Answer

Q208) Which of the following is false?
I. The human liver fluke, a nematode parasite, depends on two intermediate hosts (snail and fish) to complete its life cycle.
II. The malaria parasite needs a vector (mosquito) to spread to other parasite.
III. The female mosquito is not considered parasite, however it needs our blood for reproduction.
IV. In case of brood parasitism, the eggs of parasitic birds (e.g. cuckoo) are not detected and ejected from the nest because of parasite's eggs resemble the hosts eggs in morphology and colour.
V. A population of frogs protected from all predators would increase indefinitely. Show Answer

Q209) The evolutionary reason a given organism interacts with another organism is to Show Answer

Q210) Which of the following is not a form of mutualism? Show Answer

Q211) Plants that produce fruits are part of a _________ mutualism. Show Answer

Q212) Parasitism is an example of a ______ interaction. Show Answer

Q213) Pathogens are classified as Show Answer

Q214) The evolution of the animal immune system was probably driven by Show Answer

Q215) Which of the following statements about competition is false? Show Answer

Q216) When two similar species live in the same area, they may evolve to become more different in order to Show Answer

Q217) Do humans exhibit any mutualistic relationships? Show Answer

Q218) Human cells contain mitochondria, which are responsible for producing the energy needed by our cells. Remember that the ancestors of mitochondria may once have been free-living prokaryotes. If mitochondria were still considered to be separate organisms within our cells, which of the following would best describe our relationship with them? Show Answer

Q219) Cowbirds lay their eggs in the nests of smaller birds. The fast-developing cowbird chicks hatch first, then push the other baby chicks out of the nest as they hatch. The cowbird is classified as a Show Answer

Q220) Pollinator mutualism are special interactions involving ______, which receive food or a place to lay eggs, and ______, which receive pollen from others of their kind. Show Answer

Q221) Consumers can alter which of the following characteristics of victims? Show Answer

Q222) The level of competition between species depends on Show Answer

Q223) Interactions among organisms can have effects at which of the following levels? Show Answer

Q224) In lichens, fungus and blue-green algae live together without causing significant harm to one another. Attempts to grow either the algae or the fungi independently result in the death of the organism. This interaction is an example of Show Answer

Q225) If a new predator is introduced to an area with a type of prey that is limited in number, the prey species is likely to Show Answer

Q226) Mutualistic relationships Show Answer

Q227) Which of the following statements is true?
I. Many secondary compounds are produced by plants for the purpose of discouraging herbivores (Grazers and Browsers).
II. Predators generally are high on lethality and low on intimacy.
III. Predators in nature are prudent because they do not exploit their prey.
IV. Parasites are low on lethality and high on intimacy. Show Answer

Q228) Which one is a physiological adaptation to cold climate?
I. Small body.
II. Accumulating glycerol and anti freezing proteins.
III. Accumulating ice nucleating protein.
IV. Hibernation. Show Answer

Q229) Which of the following is not a way a parasite can spend its life? Show Answer

Q230) Predators are important for a natural ecosystems because they -
I. Keep prey population under control.
II. Helps in maintaining species diversity.
III. Are used in biological control method.
IV. They reduced intensity of competition among completing prey species. Show Answer

Q231) I. Some species of insects and frogs are cryptically-coloured (Camouflaged).
II. Some animals are poisonous.
III. Some animals (e.g. monarch butterfly) are distasteful due to having chemical in their bodies.
The above adaptations are against Show Answer

Q232) The population explosion that occurred shortly after the prickly pear cactus (opuntia) introduced to Australia in early 1920's is an example of Show Answer

Q233) For the defence against predators, butterflies become highly distasteful due to having certain chemical in their bodies. What is the source of the chemical? Show Answer

Q234) Which of the following is the example of biological control? Show Answer

Q235) A secondary compound is not a part of the plants Show Answer

Q236) No predator become proficient at acquiring prey because Show Answer

Q237) You never see cattle or goats browsing on weed calotropis. Why? Show Answer

Q238) According to Darwin which of the following is a potent force in organic evolution? Show Answer

Q239) Which of the following is not entirely true fact? Show Answer

Q240) In certain shallow lake of South America, the visiting flamingos and resident fishes compete for _______ as their food. Show Answer

Q241) Two organisms that use the same resources when those sources are in short supply are said to be Show Answer

Q242) What is the type of ecological relationship that can involve either members of the same species or different species and in which both participants are harmed? Show Answer

Q243) Two species of barnacles vie for space in the intertidal zone. The one that remains is Show Answer

Q244) The interaction between smaller barnacle Chthamalus and larger barnacle Balanus in intertidal zone is Show Answer

Q245) Find out the false one? Show Answer

Q246) Connell's elegant field experiments are related to Show Answer

Q247) The American MacArthur observed, in 1985 that 5 species of similar warblers coexist on spruce tree because they Show Answer

Q248) Which ecological unit or relationship is least related to abiotic factors? Show Answer

Q249) The overall role of an organism in its environment is called a(n) _______. Show Answer

Q250) Select the false one Show Answer

Q251) The fitness of one species (measured in terms of its 'r', the intrinsic rate to increase) is significantly lower in the presence of another species. The above phenomenon refers to Show Answer

Q252) When resources are limited, the competitively superior species eventually eliminate the other species. It is relatively Show Answer

Q253) Community its Show Answer

Q254) Population dynamics is related to Show Answer

Q255) In small isolated tribal population Show Answer

Q256) Term homeostasis in an ecosystem refers to Show Answer

Q257) The spread of opuntia was controlled by Show Answer

Q258) A bird introduced from another country became a serious pest due to Show Answer

Q259) At asymptote stage, the population is Show Answer

Q260) Changing population is Show Answer

Q261) Migration in birds is guided in part by Show Answer

Q262) Which of the following was not usually observed by G. F. Gause in his studies on interspecific competition? Show Answer

Q263) Which of the following is correct? Show Answer

Q264) If two sympatric species occupy very similar niche under natural condition, one would expect Show Answer

Q265) Which one of the following populations will show the greatest population increase in the next year, assuming exponential growth? Show Answer

Q266) When does competitive exclusion theory state? Show Answer

Q267) Through resource partitioning Show Answer

Q268) Which of the following is not correct? Show Answer

Q269) Commensalism is the interaction in which one species benefits and the other is neither harmed nor benefited. Which of the following is the example of commenaslim? Show Answer

Q270) A female fig wasp enters the syconium of a fig, pollinates the flowers, and lays eggs in the ovaries of some of the flowers. The young larvae grow up, eat (and kill) some, but not all, of the seeds, and complete their life cycle. The fig is completely dependent on fig wasps to pollinate its flowers, and the fig wasp requires figs to complete its life cycle. The interaction between figs and fig wasps has aspects of Show Answer

Q271) The most spectacular and evolutionarily fascinating examples of mutualism is found in Show Answer

Q272) An example of species - Specific co-evolution is certain plant species and the single species of animal that pollinates the plant. This type beneficial system is the safeguard against Show Answer

Q273) Which of the following plants employs 'sexual deceit' to get pollination done by a species of bee? Show Answer

Q274) An example of species-specific co-evolution is Show Answer

Q275) Resource partitioning includes Show Answer

Q276) A species whose distribution is restricted to small geographical area due to the presence of a comparatively superior species, expands its distribution when the competing species is experimentally removed. This phenomenon is called Show Answer

Q277) Ecologists say that a niche is like a species ________, while habitat is like its ________. Show Answer

Q278) Consider the following statements A - D each with one or two blanks.
A. Bears go into ___(1)____ during winter to ___(2)___ cold weather.
B. A conical age pyramid with a broad base represents ___(3)___ human population.
C. A wasp pollinating a fig flower is an example of ___(4)____.
D. An area with high levels of species richness is known as ___(5)____.
Which one of the following options, gives the correct fill ups for the respective blank numbers from (1) to (5) in the statements? Show Answer

Q279) Which graph correctly depicts the rate of respiration of a non-hibernating mammal living in cold climate? Show Answer

Q280) Large Woody Vines are more commonly found in Show Answer

Q281) Which one of the following is categorized as a parasite in true sense? Show Answer

Q282) Natural selection operates at Show Answer

Q283) In an age pyramid, the number of individuals of reproductive age is lesser than prereproductive but higher than post reproductive ones. The population is Show Answer

Q284) Verhulst-Pearl logistic growth pattern is Show Answer

Q285) The interaction is detrimental to both the species, in Show Answer

Q286) The association of Staphylococcus and Penicillium is Show Answer

Q287) The association between clown fish and sea anemone is the same as between Show Answer

Q288) In growth pattern (1 - N/K) is Show Answer

Q289) A population growth becomes asymptote when population density Show Answer

Q290) When the value of 'r' is significantly low as compared to another species, it is better known by Show Answer

Q291) Which of the following is most appropriately defined? Show Answer

Q292) What are "large undisturbed areas where wild life is protected in its natural habitat"? Show Answer

Q293) The growth rate of a population during the exponential phase is ________ and during the maximum stationary phase of growth are ______. Show Answer

Q294) The animals that rely on the heat from environment than metabolism to raise their body temperature are, in strict sense called Show Answer

Q295) Formation of tropical forests needs mean annual temperature and mean annual precipitation as Show Answer

Q296) If a population of 50 Paramoecium present in a pool increases to 150 after an hour, what would be the growth rate of population? Show Answer

Q297) If a population of 50 Paramoecium present in a pool increases to 150 after an hour, what would be the percent growth or birth rate per individual per hour? Show Answer

Q298) Which one of the following organisms reproduces sexually only once in its life time? Show Answer

Q299) Just as a person moving from Delhi to Shimla to escape the heat for the duration of hot summer, thousands of migratory birds from Siberia and other extremely cold northern regions move to Show Answer

Q300) The success of mammals on earth is largely because Show Answer

Q301) Which one of the following causes population explosion? Show Answer

Q302) Go through the following statements.
A. All birds and mammals are capable of thermoregulation.
B. Majority of animals and nearly all plants cannot maintain a constant internal environment.
C. Shivering is a kind of exercise which produces heat and raises body temperature.
D. Very small animals are commonly found in polar regions as they have to spend less energy to generate body heat.
E. Diapause is a stage of suspended development seen in zooplanktons.
Which of the above statements regarding responses of organisms to abiotic factors is false? Show Answer

Q303) Allen's rule applies to Show Answer

Q304) Which statement explains why two species cannot permanently occupy the same ecological niche? Show Answer

Q305) Hibernating animals have tissues containing mitochondria with a membrane protein that accelerates electron transport, while blocking the synthesis of ATP. What is the consequence of this? Show Answer

Q306) In which of the following interactions both partners are adversely affected? Show Answer

Q307) An association of individuals of different species living in the same habitat and having functional interactions is Show Answer

Q308) The correct sentences in the following is/are Show Answer

Q309) Which of the following is correct? Show Answer

Q310) In case of scarcity of food or limitation of habitat, animal population is sure to starve and die. Human escape this disaster by Show Answer

Q311) In a population per capital birth rate is 0.15 and per capital death rate is 0.08 during a unit time period. What is the value of r (intrinsic rate of natural increase) for the given population? Show Answer

Q312) Which of the following is correct with reference to population growth? Show Answer

Q313) Gause's principle of competitive exclusion states that Show Answer

Q314) It is much easier for a small animal to run uphill than for a large animal because Show Answer

Q315) When does the growth rate of population following the logistic model equal zero? The logistic model is given as dN/dt = rN (1 - N/K) Show Answer

Q316) Which of the following is correct for r-selected species? Show Answer

Q317) If '+' sign is assigned to beneficial interaction '-' sign to detrimental and '0' sign to neutral interaction, then the population interaction represented by '+' '-' refers to Show Answer

Q318) The principle of competitive exclusion was stated by Show Answer

Q319) Close resemblance in the appearance of Monarch butterfly and Queen butterfly is an example of Show Answer

Q320) Amongst hydrophytes finely dissected leaves occur in Show Answer

Q321) Place occupied by an organism in relation to environment is Show Answer

Q322) When two related populations occupy geographically or spatially separate areas, they are called Show Answer

Q323) The maximum growth rate occurs in Show Answer

Q324) Interspecific interaction could be Show Answer

Q325) The relationship between the alga Microcystis and the surroundings fauna correspond to Show Answer

Q326) Climate is the Show Answer

Q327) Basic unit of ecological hierarchy is Show Answer

Q328) Population is the total number of Show Answer

Q329) Ecotype is Show Answer

Q330) American lakes visiting flamingoes and resident fishes compete for their common food …A… in the lake resources …B… limiting for competition to occur; in interference competition, the feeding efficiency of one species might be …C… due to the interfering and inhibitory presence of the other species, even if resources (food and space) are abundant
Choose the correct option for A, B and C Show Answer

Q331) Mass of living matter at a trophic level in an area at any time is called Show Answer

Q332) The term ‘Niche’ was first used by Show Answer

Q333) In the association between two organisms, if one organism is benefitted and the other is not benefitted, this relationship is known as Show Answer

Q334) Ephemerals are xerophytes that are Show Answer

Q335) The size of the clay particle is less than Show Answer

Q336) Major biomes of India includes
I. tropical rainforest
II. Alpine region
III. deciduous forest
IV. Desert
V.Himalayan region
VI.sea coast
Choose the correct combination for given question Show Answer

Q337) Plats which behave as mesophytes in rainy season and as xerophytes in summers are called Show Answer

Q338) A species inhabiting different geographical area is known as Show Answer

Q339) A female fig wasp enters the syconium of a fig, pollinates the flowers and lays eggs in the ovaries of some of the flowers. The young larvae grow up, eat (and kill) some, but not all of the seeds and complete their life cycle.
The fig is completely dependent on fig wasps to pollinate its flowers and the fig wasp requires figs to complete its life cycle
The interaction between figs and fig wasps has aspects of
I.mutualism
II.host-parasite interaction
III.competition
IV.ammensalism
V.protocooperation Select the correct option Show Answer

Q340) Population growth curve in most animals, except humans is Show Answer

Q341) Nosema notabilis is an example for Show Answer

Q342) Populations evolve to maximise their reproductive fitness are also called Show Answer

Q343) Ecologist say that niche is like a species …A…, while habitat is like a …B… there A and B indicate Show Answer

Q344) Temperature is very significant to the living beings because of Show Answer

Q345) Autecology is the study of relationship between Show Answer

Q346) Competition for light, nutrients and space is most severe between
Show Answer

Q347) Which of the following is true regarding exponential growth? Show Answer

Q348) Mycorrhizal represents an intimate mutualistic relationship between Show Answer

Q349) If in a pond there are 20 lotus plants of last year and through reproduction 8 new plants are added. Then the birth rate is Show Answer

Q350) Any species growing …A… growing under unlimited resource conditions can reach enormous population densities in a short time. Darwin showed how even …B… growing animal like elephant could reach enormous numbers in absence of check and that characteristics of organism is called C.
Choose the correct option for A, B or C respectively Show Answer

Q351) July 11th is observed as Show Answer

Q352) Light is Show Answer

Q353) Pedology refers to study of Show Answer

Q354) Submerged hydrophytes show Show Answer

Q355) Under a particular set of selection pressure, organisms evolve towards the most …A… reproductive strategy. Some organisms breed only …B… in lifetime while others breed …C… in life time.
Choose the correct option for A, B and C Show Answer

Q356) Weather is the Show Answer

Q357) Sea plants are an example of Show Answer

Q358) Halophytes are Show Answer

Q359) Adaptation may be Show Answer

Q360) …A… regulators are able to maintain homeostasis by means which ensures constant body temperature, constant osmotic concentration, etc. All …B… and …C…. and is very few lower vertebrate and invertebrate species are indeed capable of such regulation (thermoregulation and osmoregulation)
Evolutionary biologists believe that the ‘success’ of mammals is largely due to their ability to maintain a constant body …D… and thrive whether they live in Antarctica or in the Sahara desert.
Choose the correct option for A, B, C and D Show Answer

Q361) The physiological capacity to produce offsprings is called Show Answer

Q362) How many horizons are present in the soil profile? Show Answer

Q363) In … phase population adopt itself to new environment and starts to increase its number Show Answer

Q364) The association of animals when both partners are benefitted is Show Answer

Q365) Factors which determine to the large extent the vegetation of any area are
I. pH of soil
II. mineral composition of the soil
III.water holding capacity of soil
IV. weather condition Choose the correct option Show Answer

Q366) The most ecologically relevant environmental factor Show Answer

Q367) The closely related morphologically similar sympatric population, but reproductively isolated are designated as Show Answer

Q368) Term ‘ecology’ was given by Show Answer

Q369) Regulators are also called Show Answer

Q370) Diapause is Show Answer

Q371) The population of an insect species shows an explosive increase in numbers during rainy season followed by its disappearance at the end of the season. What does this show? Show Answer

Q372) Which of the following is categorised as a parasite in true sense? Show Answer

Q373) Ratio between mortality and natality is called Show Answer

Q374) Behavioural adaptation to environment in desert lizards are
I. Burrowing soil
II. Losing heat during high temperature
III. Active during morning and evening
IV. Insulating body due to thick fatty dermis.
Select the correct pair Show Answer

Q375) Temperature decreases progressively from the Show Answer

Q376) A population growing in a habitat with limited resources shows four phases of growth in the following sequence Show Answer

Q377) Population density is the population per unit Show Answer

Q378) Which of the following is inappropriately defined?
I. Host is an organism which provides only food, shelter to another organism
II. Amensalism is a relationship in which one species is benefitted, whereas the other is unaffected
III. Predator is an organism that catches and kills other organism for food of same species
IV. Parasite is an organism which always lives inside the body of other organism and may kill it .
Select the correct option Show Answer

Q379) Radiation below the visible range are called Show Answer

Q380) Competition of species leads to Show Answer

Q381) Model is Show Answer

Q382) Census is Show Answer

Q383) In bacteria, fungi and lower plants, various of thick-walled …A… are formed, which help them to survive …B… conditions-these germinate on availability of suitable environment. In higher plants …C… and some other vegetative reproductive structures serve as means to tide over periods of stress besides helping in dispersal-they germinate to form new plants under favourable moisture and temperate conditions Choose the correct option for A, B and C Show Answer

Q384) Biotic community is the assemblage of populations of Show Answer

Q385) Ecology is the branch of biology which deals with interaction between Show Answer

Q386) Life history traits of organisms have evolved in relation to the constraints imposed by which components of habitat Show Answer

Q387) I. Salt concentration (parts par thousand) in sea water is …A…
II. Salt concentration (parts per thousand) in hypersaline water is …B…
Choose the correct option for A and B Show Answer

Q388) B-horizon is also called Show Answer

Q389) Plant grows best in the
I.acidic soil
II.basic soil
III.neutral soil
IV.slightly acidic soil
Choose the correct combination Show Answer

Q390) Choose the incorrect statements
Show Answer

Q391) Pollination is an example of Show Answer

Q392) Root cap is not found in Show Answer

Q393) Which model is considered a more realistic one? Show Answer

Q394) Salt concentration (parts par thousand) is less than 5% in Show Answer

Q395) An interaction favourable to both population, but no obligatory to either is Show Answer

Q396) Phenomenal and rapid increase of population in a short period is called Show Answer

Q397) Life on earth originated in Show Answer

Q398) The soil with poorest water holding capacity is Show Answer

Q399) Differentiation of various tissue and organs in response to light is called Show Answer

Q400) In a population, unrestricted reproductive capacity is called Show Answer

Q401) Leve of competition between species depends on
I. availability of resources
II.population density
III. group interaction of organis
Choose the correct combination Show Answer

Q402) Concept of mimicry was given by …A… Father of Indian Plant Ecology …B… Term ‘ecology’ coined by …C…
Here A, B and C refers to Show Answer

Q403) Partial regulators are the organism which Show Answer

Q404) A population growing in a habitat with …A… resources show initially a …B… phase, followed by phase of acceleration and deceleration and finally an asymptote, when the population density reaches the …C… .
Choose the correct option for A, B and C Show Answer

Q405) Altitude sickness is Show Answer

Q406) Plants grown on sandy soil, are grouped under Show Answer

Q407) Ecology is basically concerned with how many levels? Show Answer

Q408) An unrestricted reproductive capacity is called Show Answer

Q409) Asymptote stage of the population is the stage of population in which the population is Show Answer

Q410) Conformers are inactive in adverse conditions due to Show Answer

Q411) A secondary compound are the part of the plants Show Answer

Q412) Age structure of a population influences population growth because Show Answer

Q413) Choose the wrong statements.
I. Two species may not live in same habitat
II. The more dissimilar the niches of two species the stronger is their competition
III. Two species can occupy the same niche in geographical area
IV. No two species may occupy the same ecosystem
The correct option is Show Answer

Q414) For better survival of the human population, which of the following steps is most important? Show Answer

Q415) Photosynthetic yield is maximum at the Show Answer

Q416) No population of any species in nature has its disposal …A… resources to permit exponential growth. This leads to competition between individuals for …B… resources. Eventually, the …C… individual will survive and reproduce.
Choose the correct option for A, B and C Show Answer

Q417) Schimper’s second low related to Show Answer

Q418) Which of the following statements regarding species interdependence are true?
I. An Association of two species where one is benefitted and other remains unaffected is called mutualism.
II. An interspecific association where both partners derive benefit from each other is called commensalism.
III. A direct food relation between two species of animals in which one animal kills and feeds on another is referred as predation.
IV. A relationship between two species of organisms where both are partners are benefitted from each other is called symbiosis. Show Answer

Q419) In a population, the condition at which the rate of addition of new members is more than the rate of individuals lost indicates Show Answer

Q420) In the absence of an external source of water, Kangaroo rat in North American desert is capable of meeting all its water requirements through Show Answer

Q421) Even a plant species, which makes its own food, cannot survive alone; it needs soil microbes to breakdown the …A… matter in soil and return the …B…. nutrients for absorption. And then, how will the plant manage pollination without an animal agent? It is obvious that in nature, animals, plants and microbes cannot live in …C… but interact in various ways to form a biological community.
Choose the correct option for A, B and C Show Answer

Q422) The growth of a population without limit at its maximal rate and also that, rates of immigration and emigration are equal, then it is called Show Answer

Q423) Which of the following characters explain the bell-shaped curve? Show Answer

Q424) In which regions of the world are hot deserts located? Show Answer

Q425) Population density of a population in a given habitat during a given period fluctuates due to change in Show Answer

Q426) Statements
I. Recent studies support competition as suggested in ‘Gauses’s Competitive Exclusion Principle’
II. Gause’s hypothesis says if two species compete for same resources then one will be eliminated by another species.
III. More recent studies point out that species facing competition might evolve mechanisms that promote co-existence rather than exclusion.
IV. Gause’s competitive exclusion principle is effective when resources are in excess.
V. Unlimited resources give better opportunity for adaptation.
Choose the correct combination of statements
Show Answer

Q427) Different organism are adapted to their environment in terms of not only survival but also reproduction.
This statement belongs to Show Answer

Q428) Which determines the flora and fauna of a place? Show Answer

Q429) Eurythermals are the organism which Show Answer

Q430) Plants growing on sand and gravel are called Show Answer

Q431) In aquatic environment the types of benthic animals are determined by Show Answer

Q432) The growth rate of a population stabilizes after Show Answer

Q433) Why exotic species become invasive sometime and starts spreading fast because of Show Answer

Q434) In commensalism Show Answer

Q435) There are two optional ways of exploitation. One way is parasitism. Which is the other one? Show Answer

Q436) Population size of Siberian cranes at Bharatpur wetlands in any year is Show Answer

Q437) Prickly pear cactus species introduced into Australia in Show Answer

Q438) Pattern of population results in a J-shaped curve obtained in Show Answer

Q439) If non-limiting conditions are provided then what will happen? Show Answer

Q440) In which one of the following habitats does the diurnal temperature of soil surface vary most? Show Answer

Q441) Character displacement take place when there is Show Answer

Q442) Gloger’s rule related to the Show Answer

Q443) Positive growth or rapid increase in the population is indicated by Show Answer

Q444) When there are large number of post-reproductive or older individuals and lesser number of pre- reproductive individuals then that population is Show Answer

Q445) Human liverfluke (a trematode parasite) depends on which two intermediate hosts.
I. Snail
II. Fish
III. Pig
IV. Mosquito
Choose the correct combination Show Answer

Q446) Prickly pear cactus (an exotic species) can brought under control (in Australia) by using Show Answer

Q447) Population is Show Answer

Q448) Ecological hierarchy comprises, which of the following sequence Show Answer

Q449) In India, human population is heavily weighed towards the younger age group as a result of Show Answer

Q450) Aerenchyma is the characteristics feature of Show Answer

Q451) Predator helps to create checks on Show Answer

Q452) Animals eating plants are categorised separately as …A…, they are in a broad ecological context, not very different from …B…Choose the correct option A and B Show Answer

Q453) The niche of a population is defined as Show Answer

Q454) Geometric representation of age structure is characteristic of Show Answer

Q455) When Darwin spoke of the struggle for existence and survival of the fittest in the nature, he was conveinced that Show Answer

Q456) Genetic drift operates in Show Answer

Q457) Which of the following is not true for a species? Show Answer

Q458) Zero growth means Show Answer

Q459) Ecological age groups of a population are
I. pre-reproductive
II. reproductive
III. post-reproductive
IV. old-age group
V. adolescent age group
VI. infertile age group
Choose the correct option for given statements Show Answer

Q460) Sigmoid growth curve is represented by Show Answer

Q461) In which one of the following pairs is the specific characteristic of soil not correctly matched? Show Answer

Q462) All aquatic vertebrates and most molluscs and cry fishes are Show Answer

Q463) Average temperature of thermal springs and deep sea hydrothermal vents exceeds Show Answer

Q464) In the oceans, the environment is perpetually dark at Show Answer

Q465) Regulators are the their animals which Show Answer

Q466) Population A-Have the intrinsic rate of natural increase is 0.2 Population B-Have the intrinsic rate of natural increase is 0.3 Population C-Have the intrinsic rate of natural increase is 0.4 Population D-Have the intrinsic rate of natural increase is 0.5
Which population will increase fastest among all of the given population? Show Answer

Q467) Ecosystem components includes Show Answer

Q468) Monarch butterflies are highly distasteful to predator due to Show Answer

Q469) Species living in a restricted geographical area is Show Answer

Q470) Pneumatophores have lenticels for Show Answer

Q471) Abiotic factors affects the
I. Structure of organisms
II. Physiology of organisms
III.Behaviour of organisms
Show Answer

Q472) Which one of the following is a matching pair of certain organism(s) and the kind of association? Show Answer

Q473) Nature and properties of soil in different places vary due to Show Answer

Q474) Zero growth of population is indicated by Show Answer

Q475) Why mammals of the colder region generally have shorter ears and limbs?
I. To minimize their surface volume ratio
II. To minimize heat loss
III. To maximize their surface volume ratio
IV. To maximize heat loss
Choose the correct combination from the given option Show Answer

Q476) The productivity and distribution of plants mainly depends on Show Answer

Q477) Which one is the edaphic factor in biosphere? Show Answer

Q478) Population density of terrestrial organisms is measured in terms of individuals per Show Answer

Q479) Two opposite forces operate in the growth and development of every population, one of them relates to the ability to reproduce at a given rate. The force opposing is called Show Answer

Q480) Which one is the example of sexual parasite? Show Answer

Q481) Good soil is that which Show Answer

Q482) Living in same habitat, organisms of same species of form Show Answer

Q483) Which of the following factors increase, the size of a population? Show Answer

Q484) Population size is more technically called Show Answer

Q485) How seals can survive in polar climate where the temperature prevails below 0℃? Show Answer

Q486) Identify the basic levels of ecology
I. Organisms
II. Populations
III. Communities
IV. Biomes
V. Human
VI. Vertebrates
Choose the correct option Show Answer

Q487) Humus is formed by Show Answer

Q488) An indirect competition for shared resources such as a particular nutrient is called Show Answer

Q489) Population size more technically called …A… (designated as N) need not necessarily to be measured in …B… only
Choose the correct option for A and B Show Answer

Q490) The permanent decrease in population number occurs due to Show Answer

Q491) Exotic species are also called
I. introduced species
II. alien species
III. non-indigenous species
IV. non-native species
Choose the correct combination
Show Answer

Q492) Keystone species deserve protection because these Show Answer

Q493) There is more competition for survival between Show Answer

Q494) Find odd one out, according to parasitism. Show Answer

Q495) They are dominant plants of the cold desert Show Answer

Q496) Study of environmental and animal relation is Show Answer

Q497) Sunlight is available as a source of energy. The sunlight is very much important in Show Answer

Q498) Which of the following is correct
I. In a population, birth rate and death rate refer to per capita births and death respectively
II. In nature, we rarely find isolated single individuals of any species
III. The size of population for any species is stable phenomena
IV. Ecological effects of any factors on a population growth are generally reflected in its size/population density
Show Answer

Q499) Which one is incorrect regarding parasitism? Show Answer

Q500) The interaction of species with the environment is called as Show Answer

Q501) Diapause is stage of suspended development in lakes and ponds. Find out the season in which it occurs Show Answer

Q502) Examples of chemicals produced by plants as a defense against grazers and browsers
I. Nicotine
II. Caffeine
III. Quinine
IV. Strychnine
V. Opium
Choose the correct combination Show Answer

Q503) Maximum survival and reproductive capacity shown by a population under optimal environmental conditions is called Show Answer

Q504) Pseudo copulation occurs in Show Answer

Q505) The age of pyramid with broad base indicates Show Answer

Q506) A high density of tiger population in an area can result in Show Answer

Q507) Plants developing in dry condition are Show Answer

Q508) Natality refers to the number of Show Answer

Q509) I. Species level
II. Population level
III. Individual level
IV. Community level
Out of the levels given at a which level selection operates Show Answer

Q510) Association of animals belonging to different species, where both partners are benefitted, is called Show Answer

Q511) Why no predator become proficient in acquiring prey? Show Answer

Q512) Hierarchy is Show Answer

Q513) The percentage of soil volume occupied by pore space is called porosity of soil. It is minimum in Show Answer

Q514) The inherent maximum capacity of an organism to reproduce or increase in number is called as Show Answer

Q515) Body compensates low oxygen availability at high altitudes by
I. increasing RBC
II. decreasing binding affinity of haemoglobin
III. increasing binding affinity of haemoglobin
IV. increasing breathing rate
V. decreasing breathing rate
Choose the correct option for given statement Show Answer

Q516) The species of plants that play a vital role in controlling the relative abundance of other species in a community are called Show Answer

Q517) If birth rate is 100, death rate is 10 and number of individuals in population group is 1000, then what will be the percentage of natural growth rate? Show Answer

Q518) In most animals, the metabolic reactions proceed in a …A… temperature range (in humans, it is 37℃). But there are microbes (archaebacteria) that flourish in hot springs and deep sea hydrothermal vents where temperature far exceed …B…Choose the correct option for A and B Show Answer

Q519) How many types of age pyramid are there? Show Answer

Q520) Competition occurs when Show Answer

Q521) I. Some species of insects and frogs are critically coloured (camouflaged)
II. Some animals are poisonous
III. Monarch butterfly are distasteful
The above adaptations are against Show Answer

Q522) I. Biochemical adaptation are seen in organisms living in great depth of the ocean to face crushing pressure
II. Allen’s rule is explain mammals living in colder climates
III. Altitude sickness is caused because of body not getting enough oxygen due to low atmospheric pressure at high altitude
IV. Desert lizards lack behavioural means to manage to their body temperature.
Choose the correct option for above adaptations Show Answer

Q523) Lichens represents an intimate mutualistic relationship between Show Answer

Q524) The science dealing with soil is Show Answer

Q525) Biological control methods adopted in agriculture pest control are based on the Show Answer

Q526) Viscum album grows on trees. This is an example of Show Answer

Q527) ‘Two closely related species competing for same resources cannot co-exist indefinately’. This law is also called Show Answer

Q528) Epiphyte is an example of Show Answer

Q529) Barnacles growing on the back of whale is an example for Show Answer

Q530) How much percentage of animals on this earth are regulators? Show Answer

Q531) Plants of aquatic habitat is called Show Answer

Q532) Which of the following is an example of a defence used by plants against herbivores?
I. Production of caffeine, tannin quinine
II. More production of non-woody tissues
III. Productions of hairs, thorns, spines
IV. Production of hormone-like chemicals that interfere with insect metamorphosis
Select the correct pair Show Answer

Q533) Which type of age pyramid obtained when the population is growing? Show Answer

Q534) The formula of growth rate for population in a given time is Show Answer

Q535) Genetically adapted population to a particular habitat is called Show Answer

Q536) Conformers are also called Show Answer

Q537) Hydrophytes are characterised by Show Answer

Q538) Interspecific interactions arise from the interaction of Show Answer

Q539) Gause’s law is true only when Show Answer

Q540) If natality rate is parallel to mortality rate then population Show Answer

Q541) Sex ratio is the Show Answer

Q542) Statements
I. Mutualistic relationship evolve when benefit of both species out weight the lost
II. Mutualism relationship evolve when benefits of both species under weight the lost
III. Human caused ecological balance by eradicating common parasite
IV. Human caused altering competition between species Select the wrong pair from statements Show Answer

Q543) Biotic potential or potential natality means Show Answer

Q544) Formation of wide variety of habitats takes place by Show Answer

Q545) Population of any species is Show Answer

Q546) Smallest unit of ecology is Show Answer

Q547) What is a keystone species? Show Answer

Q548) Find out the correct ones
I. Mammals of colder climate generally have shorter ears and limbs to minimize heat loss
II. All organisms have behavioural adaptations that allow them to respond quickly to a stressful situation
III. Some organisms possess behavioural adaptations which allow them migrating temporarily to a less stressful situation
IV. Invertebrates and fishes live at great depths in the ocean have biochemical adaptation to cope with high pressure Show Answer

Q549) At high altitude we feels the sickness. The reason for sickness may be due to Show Answer

Q550) What is probiosis? Show Answer

Q551) A lake near a village suffered heavy mortality of fishes within a few days. Consider the following reasons for this
I. Lots of urea and phosphate fertilizers were used in the crops in the vicinity.
II. The area was sprayed with DDT by an aircraft.
III. The lake water turned green and stinky.
IV. Phytoplankton populations in the lake declined initially thereby greatly reducing photosynthesis.
Which two of the above were the main causes of fish mortality in the lake? Show Answer

Q552) Logistic growth is represented by which equation Show Answer

Q553) Desert lizards lack the …A… ability that mammals have to deal with the …B… temperatures of their habitat, but manage to keep their body temperature fairly constant by …C… means.
Choose the correct option for A, B and C Show Answer

Q554) Plants growing in dry and saline soil are called Show Answer

Q555) Adaptation of parasite may be
I. loss of unnecessary organs
II. presence of adhesive organs
III. origin of suckers to cling to host
IV. loss of digestive system
V. high reproductive capacity
Choose the correct combination
Show Answer

Q556) Exponential growth in plants can be expressed as Show Answer

Q557) Homeostasis is Show Answer

Q558) Ecology at the organism level is also called Show Answer

Q559) Synecology is the study of relationship between Show Answer

Q560) Starfish pisaster is the important predator in intertidal communities of Show Answer

Q561) Under normal condition …A… and ….B… are the most important factors influencing populations density …C… and …D… assuming importance only under special condition.
Choose the correct option for A, B and C Show Answer

Q562) If the strong partner is benefitted and the weak partner is damaged. It is known as Show Answer

Q563) Who stated that human population grows geometrically? Show Answer

Q564) Attribute of the organisms (morphological, physiological and behavioural) that enables organism to survive and reproduce in its habitat is called Show Answer

Q565) Altitude sickness occurs at high Mountains. This sickness have symptoms like Show Answer

Q566) Heat loss or heat gain is a function of surface area. Since small animals have a …A… relative to their volume, they tend to lose body heat very fast, when it is cold outside; then they have to expend …B… to generate body heat through metabolism. This is the main reason why very small animals are …C… found in polar regions.
Choose the correct options for A, B and C Show Answer

Q567) You never see any cattle or goat browsing on Calotropis due to Show Answer

Q568) The desert plants in order to tolerate water stress, show Show Answer

Q569) The type of population, where pre-reproductive animals occur in large numbers, is Show Answer

Q570) Which characteristics determine the percolation and water holding capacity of soils? Show Answer

Q571) During the course of million of years of their existence most species should have evolved a relatively …A… internal environment (within the body of organisms). This internal environment would permit all biochemical reactions and physiological functions to proceed with …B… efficiency and therefore, increase the overall fitness of the species The ability of an organism to keep the internal environment constant despite drastic changes in external conditions is called …C…
Choose the correct option for A, B and C Show Answer

Q572) To avoid the competive exclusion principle two similar species live in same area, they may evolve to become more different in order to Show Answer

Q573) Choose the wrong statement Show Answer

Q574) Reproductive value of an individual is greatest just before Show Answer

Q575) In an area there are 200 Parthenium and is single banyan tree. Which of the conculsion (s) is/are correct?
I. Population density of banyan is low
II. Population cover area of banyan is high
III. In above cases the percentage of cover of biomass is more meaningful than population size Show Answer

Q576) Populations termed r-strategists Show Answer

Q577) If the mean and the madian pertaining to a certain character of a population are of the same value, the following is most likely to occur Show Answer

Q578) Environment factor (s) that characterize the habitat of ecosystem is/are Show Answer

Q579) Two species occupying same or overlapping area are called as Show Answer

Q580) Predation is Show Answer

Q581) The organisms inhabiting a common environment belong to the same Show Answer

Q582) NEERI is Show Answer

Q583) Formation of major biomes such as desert, rainforest takes place by Show Answer