ZoologyIncomplete double circulation occurs in

Incomplete double circulation occurs in

  1. A

    fishes and amphibians.

  2. B

    amphibians and reptiles.

  3. C

    reptiles and birds.

  4. D

    birds and mammals.

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    Solution:

    Incomplete double circulation occurs in amphibians and reptiles. 

    Single circulation occurs in fishes.

    Double circulation occurs in birds and mammals.

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