The mammals (animals) from colder climates generally have shorter hair and not fully developed ear, eyes and other phenotypic characters. This is known as
Dalla's law
Allen's rule
Cope's law
Bergmann's law
A
Allen's rule
B
Cope's law
C
Bergmann's law
D
Dalla's law
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Solution
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Allen's rule is a rule formulated by Joel Asaph Allen in 1877, broadly stating that animals adapted to cold climates have shorter limbs and body appendages than animals adapted to warm climates. So the correct option is 'Allen's rule'.
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