Which one of the following animals has two separate circulatory pathways?

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Whale

Shark

Frog

Lizard

answer is A.

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Detailed Solution

Two separate circulatory pathways mean complete double circulation. It is observed in birds and mammals. Whale is a member of class Mammalia with 4 chambered heart and exhibits complete double circulation.

Shark-Single circuit system

Frog-Incomplete double circulation

Lizard-Incomplete double circulation

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