Osculum occurs in

  • A
    Star Fish
  • B
    Ray Fish
  • C
    Hydra
  • D
    Sponge

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The simplest type of canal system in Porifera is:

Identify the animals of the phylum Porifera given below.

In sponges,the canal system develops due to:

From the following statements,select the wrong one.

Choanocytes in the $Ascon$-type of canal system form the lining of:

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