Q. Ascaris is characterized by
A) Absence of true coelom but presence of metamerism
B) Presence of neither true coelom nor metamerism
C) Presence of true coelom and metamerism
D) Presence of true coelom and metamerism (metamerisation)
Explanation
Body of Ascaris is elongate, cylindrical 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 coleom as it is not lined by coelomic epithelium, has no relations with reproductive and excretory organs and develops from blastocoel.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.