A) Gloger?s rule - Pigmentation
B) Bergmann?s rule - Size of animals
C) Alien?s rule - Narrow wings of birds in cold areas
D) Jordan?s rule - More vertebrae in colder water fishes
Correct Answer: C
Solution :
Extremities of mammals (ear, snout, tail and legs) of colder areas are shorter than those of warmer regions (Alien?s rule).
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