Question
Biology Question on Kingdom Animalia
Ascaris is characterized by
A
presence of true coelom but absence of metamerism
B
presence of true coelom and metamerism (metamerisation)
C
absence of true coelom but presence of metamerism
D
presence of neither true coelom nor metamerism.
Answer
presence of neither true coelom nor metamerism.
Explanation
Solution
Ascaris belong to the phylum Nematoda of super phylum 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 pseudosegmented appearance to the worm.