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Ascaris is characterized by

1. absence of true coelom but presence of metamerism
2. presence of neither true coelom nor metamerism
3. presence of true coelom but absence of metamerism
4. presence of true coelom and metamerism (metamerisation)

Correct answer: presence of true coelom but absence of metamerism

Solution

Ascaris is a type of roundworm that has a true coelom, but it lacks metamerism, which is the repetition of body parts.

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