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Question

A four chambered heart is not found in


A
birds
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B
mammals
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C
snakes
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D
crocodiles
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Solution

The correct option is A snakes
Mammals and birds have four chambered hearts (two atria and two ventricles).
All reptiles have three chambered heart. Hence, snakes have three chambered hearts (two atria and one ventricle). But crocodiles are exceptions as they are reptilians with four chambered heart.

Biology

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