Q.

Allen’s rule explains

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a

morphological adaptation of mammals

b

behavioural adaptation of lizards

c

biochemical adaptation of fishes

d

anatomical adaptation of amphibians 

answer is A.

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Detailed Solution

According to Allen’s rule, mammals from colder climates generally have shorter ears and limbs to minimise heat loss. This is a morphological adaptation in mammals of colder regions to minimise heat loss.
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Allen’s rule explains