THE POLAR REGIONS

Assertion (A):Despite low evaporation and stable strati fication of the atmosphere, salinity is high in polar regions. Reason (R): Sea water freezes leaving the remaining water saline than before. Codes :

Assertion (A) : Despite low evaporation and stable stratification of the atmosphere, salinity is high in polar regions. Reason ( R) : Sea water freezes leaving the remaining water saline than before.

The Physics Phenomenon when, in Polar regions like Alaska and Northern Canada, a splendid display of colours is seen in the sky is called a/an:

Assertion : Productivity generally increases from polar regions toward the tropics. Reason : It is due to increasing sunlight and temperature toward the tropics.

Assertion:- Very small organisms rarely found in polar regions. Reason:- Small animals have a larger surface area relative to their volume, they tend to lose body heat very fast when it is cold outside.

Assertion : Small sized animals are rarely found in polar regions. Reason : Small sized animals have larger surface area relative to their volume and they have to spend much energy to generate body heat through metabolism.

Assertion: On planet Earth, life exist not just in a few favourable habitats but even in extreme and harsh habitats such as according Rajasthan deserty, perpetually rain-soaked Meghalaya forest, deep ocean trenches, torrential streams, permafrost polar regions, high mountian tops, streams, permafrost polar regions, high mountains tops, boiling thermal springs, and stinking compost pits, etc. Reason: Even our intestine is a unique habitat for hundereds of species of microbes.

Assertion: Very small animals are rarely found in polar regions. Reason: Smaller animals have larger area to volume ratio, they tend to lose heat very fast when it is cold outside then they have to expend much energy to generate body heat through metabolism.