Multiple choice

The amphibians and reptiles have a

  1. three-chambered heart

  2. two-chambered heart

  3. four-chambered heart

  4. None of these
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A Correct answer
Explanation

Amphibians (like frogs) and reptiles (like lizards) have three-chambered hearts with two atria and one ventricle, which allows some mixing of oxygenated and deoxygenated blood. Fish have two-chambered hearts, while birds and mammals have four-chambered hearts.

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