Which one of the following animals has two separate circulatory pathways?
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a
Whale
b
Shark
c
Frog
d
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 systemFrog-Incomplete double circulationLizard-Incomplete double circulation