Ascaris is characterized by :

Presence of true coelom but absence of metamerism

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Presence of true coelom and metamerism

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Absence of true coelom but presence of metamerism

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Presence of neither true coelom nor metamerism

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Solution

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.

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Question 40
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