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Question

The segment of earthworm in which mouth is situated is called

  1. Prosoma
  2. Prostomium
  3. Peristomium
  4. Prosegment

A
Prosoma
B
Prostomium
C
Peristomium
D
Prosegment
Solution
Verified by Toppr

  • Earthworm lack distinct head. The first segment at the anterior end of the body is called peristomium or buccal segment which bears crescentic mouth.
  • Peristomium bears a fleshly lobe-like structure called prostomium which hangs over the mouth ventrally.
So, the correct option is 'Peristomium'.

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