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What is the correct answer?

4

Which of the following feature in birds indicates their reptilian ancestory ?

A. Eggs with a calcareous shell

B. Scales on their hind limbs

C. Four-chambered heart

D. Two special chambers-crop and gizzard in their digestive tract

Correct Answer :

C. Four-chambered heart


Four chambered heart in birds indicates their reptilian ancestry.
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