alleryA 3-chambered heart is characteristic of
AFishes with two chambers only
BAmphibians and most reptiles
CCrocodiles among reptiles only
DBirds and mammals always
Answer & Solution
Correct answer: B. Amphibians and most reptiles
Amphibians and most reptiles have 3 chambers (2 atria + 1 ventricle), allowing incomplete double circulation.
Fishes have 2 chambers
crocodiles, birds and mammals have 4 chambers with complete double circulation.
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