Practice Test

What would happen if phytoplankton of an ocean is completely destroyed ?

1) The ocean as a carbon sink would be adversely affected.

2) The food chains in the ocean would be adversely affected

3) The density of ocean water would drastically reduce

Which of the above statements is/are correct ?

Consider the following statements-
1. The sea surface temperatures vary from place to place.
2. In the equatorial regions, it is high and it is progressively low as we go from the equator to the poles.
3. In the sea water, there is a high concentration of mineral salts and salinity.
4. Salinity also differs from place to place.
5. The ratio of salinity depends upon the addition of freshwater in the seas and the rate of evaporation.
6. Waves, tides and currents are the movements of the ocean waters.
7. They influence the temperature, moisture and rainfall of the coastal areas they flow to.
Select the correct answer using the codes given below.

Assertion (A) Aridity is the distinctive characteristic of the deserts
Reason ( R ) They receive low rainfall and have high evaporation
Select the correct answer from the codes given below