Practice Test

Q1) Growth is defined as Show Answer

Q2) In unicellular organism growth is shown by Show Answer

Q3) In living organisms, growth is Show Answer

Q4) During germination due to water, ________ enzymes become active. Show Answer

Q5) In hypogeal germination Show Answer

Q6) In hypogeal germination, due to the elongation of _______ plumule comes out of the ground. Show Answer

Q7) Hypogeal germination is found in Show Answer

Q8) Hypogeal germination is seen in Show Answer

Q9) During epigeal germination of seed Show Answer

Q10) Vivipary is the characteristic feature of Show Answer

Q11) Vivipary germination is observed in Show Answer

Q12) Vivipary is the germination Show Answer

Q13) Epigeal germination is found in Show Answer

Q14) On the basis of the type of seed germination identify the ODD one. Show Answer

Q15) In hypogeal germination, the cotyledons of seed never become photosynthetic as they Show Answer

Q16) Germination takes place when the Show Answer

Q17) Oxygen is essential for seed germination because Show Answer

Q18) Which of the following is/are common to both hypogeal and epigeal types of seed germination ? Show Answer

Q19) Plant growth is Show Answer

Q20) Changes due to growth is Show Answer

Q21) Meristematic cells have the capacity Show Answer

Q22) The meristem which is present from embryonic condition is called Show Answer

Q23) Development in organisms involves Show Answer

Q24) Growth is maximum in the zone of Show Answer

Q25) In a growing plant, the very first phase during the process of growth is Show Answer

Q26) Formation phase is Show Answer

Q27) In lag phase, growth is Show Answer

Q28) In plants, growth plotted against time gives a Show Answer

Q29) Maximum rate of growth occurs in Show Answer

Q30) Growing plants in dark that causes bending and reduction in size is Show Answer

Q31) In root,the region of fastest growth is Show Answer

Q32) The term 'Grand period of growth' was given by Show Answer

Q33) The growth of a plant in log phase is Show Answer

Q34) The phenomenon of growth is immediately followed by Show Answer

Q35) Growth period of plant between seed germination to flower formation is called Show Answer

Q36) In the apical region of a young angiospermic stem, log phase of growth can be seen in the region of Show Answer

Q37) In the apical region of a young angiospermic root, the growth changes which occur during cell differentiation and maturation correspond with the Show Answer

Q38) Highest auxin concentration occurs Show Answer

Q39) Among the following synthetic auxin is Show Answer

Q40) Apical dominance is caused by which of the following hormones ? Show Answer

Q41) Which of the following plant functions is not controlled by auxins ? Show Answer

Q42) Growth hormone responsible for apical dominance is Show Answer

Q43) I.A.A. stands for Show Answer

Q44) Which of the following effects of auxins on plants is used for commercial application ? Show Answer

Q45) Avena curvature test was done by Show Answer

Q46) Which of the following is used as a weedicide ? Show Answer

Q47) Naturally occurring auxin is Show Answer

Q48) Substances formed at the stem tip and controlling growth elsewhere are Show Answer

Q49) Auxin suppresses the growth of Show Answer

Q50) Higher concentration of some synthetic auxins is used for Show Answer

Q51) Movement of auxin is Show Answer

Q52) Auxin synthesis occurs in Show Answer

Q53) Auxin takes part primarily in Show Answer

Q54) What is false about auxin ? Show Answer

Q55) Natural auxins are synthesized from Show Answer

Q56) Abscission layer is formed when the concentration of Show Answer

Q57) Which of the following hormone is translocated to other parts of the plant and exibit a polar movement ? Show Answer

Q58) Auxin which is highly efficient in the induction of roots on stem cutting in the Show Answer

Q59) Commercial use of auxin is Show Answer

Q60) 2, 4-D causes Show Answer

Q61) Removal of apical bud result in the Show Answer

Q62) Fruit drop is prevented by spraying Show Answer

Q63) First chemical identification of auxin. indole 3-acetic acid, was carried out by Show Answer

Q64) Which of the following is used in root formation on stem cuttings ? Show Answer

Q65) Growth curve in plant is Show Answer

Q66) Apical dominance is Show Answer

Q67) Apical dominance includes the Show Answer

Q68) Auxins differ from other regulating compunds in plants because auxins Show Answer

Q69) Which of the following stimulates cell division ? Show Answer

Q70) Some early experiments on phototropic curvature in glasses led to the discovery of Show Answer

Q71) An important finding in Went's experiment was Show Answer

Q72) Parthenocarpy can be achieved by Show Answer

Q73) Avena coleoptile auxin is Show Answer

Q74) Prunning of plants promotes branching due to sensitization of axillary buds by Show Answer

Q75) What is the role of auxin ? Show Answer

Q76) Apical dominance is caused by Show Answer

Q77) More auxins than cytokinins initiates Show Answer

Q78) Which of the following hormone is concerned chiefly with root initiation ? Show Answer

Q79) For rooting on stem cuttings or on leaves of Bryophyllum the growth regulator used is Show Answer

Q80) Apical dominance in higher plants is due to Show Answer

Q81) The pineapple, which under natural conditions is difficult to blossom has been made to produce fruits throughout the year by the application of Show Answer

Q82) Internodal elongation is stimulated by Show Answer

Q83) Bakanae disease of rice is due to Show Answer

Q84) Which of the following physiological effects is caused in plants by gibberellic acid ? Show Answer

Q85) Gibberellin was first extracted from Show Answer

Q86) Gibberella fujikuroi is a/an Show Answer

Q87) Gibberellin was first discovered by Show Answer

Q88) Gibberellic acid induces flowering in Show Answer

Q89) Gibberellins induce Show Answer

Q90) Dwarfness can be controlled by treating the plant with Show Answer

Q91) Gibberellins bring about Show Answer

Q92) Gibberellins promote Show Answer

Q93) Size of grapes are increased by the application of Show Answer

Q94) Gibberrellic acid includes flowering Show Answer

Q95) Mobilization of stored food in germinating seeds is triggered by Show Answer

Q96) Seed dormancy can be broken by the spray of Show Answer

Q97) Cut or excised leaves remain green for long, if dipped in Show Answer

Q98) Cytokinin Show Answer

Q99) 'Richmond Lang effect' refers to the Show Answer

Q100) The Richmond-Lang effect pertains to Show Answer

Q101) Senescence is the Show Answer

Q102) What is true about ethylene ? Show Answer

Q103) Out of following which one is known as a secondary hormone ? Show Answer

Q104) The effect of ethylene is inhibited due to Show Answer

Q105) Which of the following acts as the precursor for the biosynthesis of ethylene in plants ? Show Answer

Q106) Ethylene is Show Answer

Q107) Which one produces more ethylene ? Show Answer

Q108) Fruit ripening is accelerated by Show Answer

Q109) Growth of lateral branches is promoted by Show Answer

Q110) When seedling tip cut off, growth and light induced bending stops because it inhibits Show Answer

Q111) The chemical nature of kinetin is Show Answer

Q112) Abscissic acid (ABA) promotes Show Answer

Q113) Hormone discovered through tissue culture technique is Show Answer

Q114) Hormone primarily related to cell division is Show Answer

Q115) Apical dominance is due to Show Answer

Q116) Which hormone is called stress hormone ? Show Answer

Q117) Artificial ripening of fruits is accomplished by Show Answer

Q118) Ethylene gas Show Answer

Q119) Development of shoot and root is determined by Show Answer

Q120) The regulator which delays the onset of senescence in plant is Show Answer

Q121) First natural cytokinin was discovered by Show Answer

Q122) The name 'zeatin' was coined by Show Answer

Q123) Which of the following is a cytokinin ? Show Answer

Q124) Hormone found in liquid endosperm of coconut is Show Answer

Q125) A plant hormone that induces morphogenesis in plant tissue culture is Show Answer

Q126) Bioassay of IAA is Show Answer

Q127) Induction of cell division and delay in senescene are due to Show Answer

Q128) Cytokinins Show Answer

Q129) Flowering of Chrysanthemum is inhibited by Show Answer

Q130) Abscissic acid, the stress related hormone, also Show Answer

Q131) Stress hormone produced during adverse environmental condition is Show Answer

Q132) Abscissic acid controls Show Answer

Q133) Which of the following induces flowering in short-day plants ? Show Answer

Q134) During drought, plants develop hormone Show Answer

Q135) Plant hormone causing abscission of leaves, senescence, bud dormancy and inhibition of cell division is Show Answer

Q136) Abscissic acid causes Show Answer

Q137) The hormone which promotes flowering in long day conditions and controls sex expression is Show Answer

Q138) Seedless tomatoes are produced by Show Answer

Q139) In autumn, leaf fall occurs because Show Answer

Q140) Stomatal closure under stress condition is due to Show Answer

Q141) Abscissic acid causes Show Answer

Q142) A plant hormone used for inducing morphogenesis in plant tissue culture is Show Answer

Q143) What will happen if apical bud is removed in a flowering plant ? Show Answer

Q144) Hormone responsible for senescence is Show Answer

Q145) The length of the plant can be increased by Show Answer

Q146) Agening of plants is related to which of the following hormone ? Show Answer

Q147) Flowering in pineapple can be induced by the application of Show Answer

Q148) In horticulture, an important root inducing chemical is Show Answer

Q149) Physiological function not influenced by ABA is Show Answer

Q150) High auxin and low cytokinin concentration produce Show Answer

Q151) ________ hormone enhances the shelf life of leafy vegetables like spinach, lettuce and vase-life of flowers. Show Answer

Q152) Identify the precursor substance among the following used in the biosynthesis of gibberellins in plants. Show Answer

Q153) Genetically, dwarf pea plant can become phenotypically tall if treated with Show Answer

Q154) Inhibition of seed germination can be done by Show Answer

Q155) Hormone responsible for plant and seed dormancy during drought is Show Answer

Q156) Growth movements in response to light and dark period are called Show Answer

Q157) In general the length (duration) in hours of a critical photoperiod is comparatively Show Answer

Q158) Florigen is produced in the region of Show Answer

Q159) When the dark period of short day plants is interrupted by a brief exposure of light, the plant Show Answer

Q160) Germination seen in groundnut is Show Answer

Q161) Growth in numbers is maximum in the zone of Show Answer

Q162) Choose the correct sequence of stages of growth curve in bacteria. Show Answer

Q163) The sigmoid curve has the shape of English letter Show Answer

Q164) Dwarfness of plant is controlled by treating it with Show Answer

Q165) Which of the following is a natural growth inhibitor ? Show Answer

Q166) Which one of the following acids is a derivative of carotenoids ? Show Answer

Q167) In unisexual plants, sex can be changed by the application of Show Answer

Q168) Who amongst the following is a discoverer of auxin ? Show Answer

Q169) Abscission is characterized by Show Answer

Q170) Which hormone can induce flowering in long day plants ? Show Answer

Q171) Plant growth hormones extracted from a fungus and a fish are respectively Show Answer

Q172) When mature green bananas are put in a sealed plastic bag, they remain green for many days. However, if they are sealed with a ripe orange, the bananas turn yellow within a few days. The reason is Show Answer

Q173) Which is not a natural plant hormone ? Show Answer

Q174) Hormone produced during leaf fall is Show Answer

Q175) Chrysanthemum flowers in winter because Show Answer

Q176) Which is short day plant ? Show Answer

Q177) If a tree flowers thrice in a year in october, january and july in northern India, the plant is Show Answer

Q178) The rate of growth gradually slows down during Show Answer

Q179) Went isolated auxin from Show Answer