A) Reptiles
B) Amphibians
C) Birds
D) Fishes
Correct Answer: C
Solution :
Birds, humans and other mammals can maintain their body temperature irrespective of external temperature variation, i.e. they are warm blooded (homeothermic) animals. While, all reptiles, insects, amphibians and fishes are cold-blooded (poikilothermic) animals. These animals cannot control their body temperature, i.e. their body temperature varies considerably.
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