A) Reptiles
B) Amphibians
C) Birds
D) Fishes
Correct Answer: C
Solution :
The maintenance of a constant body temperature higher than that of the environment is called homeothermy. Homeothermv is the characteristic feature of birds and mammals. The condition of any animal whose temperature fluctuates considerably with that of its environment is called poikilothermv. It is the characteristic feature of invertebrates and vertebrates other than birds and mammals.
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