Q148 / 200 · NEET 2021 · Zoology

Following are the statements about prostomium of earthworm.
(a) It serves as a covering for the mouth.
(b) It helps to open cracks in the soil into which it can crawl.
(c) It is one of the sensory structures.
(d) It is the first body segment.

  • Correct answer
    A
    (a), (b) and (c) are correct
  • B
    (a), (b) and (d) are correct
  • C
    (a), (b), (c) and (d) are correct
  • D
    (b) and (c) are correct

Solution

In an earthworm, the anterior end of the body consists of the mouth and the prostomium. The prostomium is a lobe that acts as a covering for the mouth and serves as a wedge to force open cracks in the soil into which the earthworm may crawl. The prostomium is sensory in function. The first segment of the body is called the peristomium.

Hence, the correct answer is option: 'A'.

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