Q. 18

Explain why very

Answer :

For small animals, thermoregulation is a very expensive process.

Heat loss or heat gain is a function of surface area which is directly proportional to it.

Compared to their volume, small animals have a larger surface area.

Therefore, they lose body heat very fast in a colder region, so they have to expend more energy to generate body heat which becomes a challenge for their survival.

This is the main reason why very small animals are rarely found in polar-regions.

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