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Question

The first warm blooded animals with feathers and adaptation for flight are found in the class


  1. Amphibians 

  2. Aves 

  3. Reptiles 

  4. Fishes


Solution

The correct option is B

Aves 


Fishes, amphibians and reptiles are poikilotherms (cold blooded). Homeothermy (warm bloodedness) first appears in birds, and is also found in mammals. Feathers and adaptation for flight are clearly avian adaptations.

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