Question

Give reason for the following
i) Kangaroo rats can survive in the absence of an external source of water.
ii) Small animals are rarely found in Polar Regions.

Answer 1

(A)Kangaroos are adapted and are capable of meeting its entire water requirement through its internal fat oxidation in which water is a by-product. It has the ability to concentrate urine.

(B)Small animals have large surface area relative to their volume, they tend to lose body heat very fast when its cold outside. Then they have to expand much on their metabolism.