ZoologyDuring the course of evolution, tympanum first appeared in

During the course of evolution, tympanum first appeared in

  1. A

    amphibians

  2. B

    fishes

  3. C

    reptiles

  4. D

    mammals

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    Solution:

    During the course of evolution tympanum, middle ear, limbs, sternum, larynx, lacrimal glands and harderian glands first appeared in Amphibia.

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