Q.

In amphibians, heart is ________ chambered.

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a

two

b

three

c

four

d

single

answer is B.

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Detailed Solution

In amphibians, the heart is three chambered  (one ventricle and two atria). Fishes : Two-chambered heartReptiles : Three-chambered heart (except crocodiles and alligators)Aves and Mammals : Four-chambered heart
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