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  • According to Allen’s Rule, the mammals from colder climates have: a. shorter ears and longer limbs b. longer ears and shorter limbs c. longer ears and longer limbs d. shorter ears and shorter limbs

According to Allen’s Rule, the mammals from colder climates have:

a. shorter ears and longer limbs

b. longer ears and shorter limbs

c. longer ears and longer limbs

d. shorter ears and shorter limbs

Answers (1)

 Joel Asaph and Allen proposed this rule in 1877. According to this rule, the body shape and proportions of endotherms vary according to climatic temperature. In colder climates, the surface area is minimized to prevent heat loss and it is maximized in warm climates to promote heat loss. Endotherms in cold climates usually have small ears and small legs. Hence, the correct option is (d). 

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