Q189 / 200 · NEET 2008 (Screening) · Zoology

Ascaris is characterised by

  • A
    absence of true coelom but presence of metamerism
  • Correct answer
    B
    presence of neither true coelom nor metamerism
  • C
    presence of true coelom but absence of metamerism
  • D
    presence of true coelom and metamerism (metamerisation)

Solution

Ascaris is an endoparasite of man. It inhabits the small intestine more frequently of children than of adults. The body is elongate, cylindrical and gradually tapering at both ends. There is no metameric segmentation. In Ascaris between body wall and visceral organs is a spacious fluid filled cavity. This cavity is not true coelom as it is not lined by coelomic epithelium, has no relation with reproductive and excretory organs and develops from blastocoel. This body cavity is referred pseudocoel.

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

Relevant Questions