ZoologyWhich of the following animal groups is not correctly paired with its characteristic?

Which of the following animal groups is not correctly paired with its characteristic?

  1. A

    Arthropoda - Chitinous exoskeleton

  2. B

    Mollusca - Exoskeleton is absent

  3. C

    Echinodermata - Excretory system is absent

  4. D

    Hemichordata - Respiration through gills

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    Solution:

    Molluscs have a calcareous shell (which represents their exoskeleton).

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