Question

Ascaris is characterized by :

• A. Presence of true coelom but absence of metamerism
• B. Presence of true coelom and metamerism
• C. Absence of true coelom but presence of metamerism
• D. Presence of neither true coelom nor metamerism

Answer 1

The correct option is D Presence of neither true coelom nor metamerism

Ascaris belong to the phylum Nematoda of superphylum Aschelminthes. They have a cylindrical body without showing any metamerism, a pseudocoel (false coelom) and a complete digestive tract lined by endodermal epithelium. The cuticle covering the body surface bears minute transverse striations giving a pseudo-segmented appearance of the worm.