ZoologyA complete alimentary canal with a muscular pharynx and non-muscular intestine is present in

A complete alimentary canal with a muscular pharynx and non-muscular intestine is present in

  1. A

    Planaria

  2. B

    Ascaris

  3. C

    Nereis

  4. D

    Ophiura

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    Solution:

    Ascaris (common roundworm) is included under phylum Aschelminthes. 

    In Aschelminthes, the alimentary canal is complete with a well-developed muscular pharynx. 

    Intestine is non-muscular. 

    Alimentary canal is incomplete in Planaria (Platyhelminthes). 

    Nereis (Annelida) has a complete alimentary canal with a muscular intestine. 

    In Ophiura (brittle star), anus is absent.

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