Question

Ascaris is characterized by

• A. presence of true coelom but absence of metamerism
• B. presence of neither true coelom nor metamerism
• C. absence of true coelom but presence of metamerism
• D. presence of true coelom and metamerism (metamerisation)

Answer 1

The correct option is B

presence of neither true coelom nor metamerism

The correct answer is B.

The explanation for the correct answer:

1. Ascaris is a parasitic roundworm belonging to the phylum Nematoda.
2. They are also known as "small intestinal roundworms."
3. They neither have true coelom nor metamerism.
4. The coelom is a fluid-filled cavity present between the gut and the outer membrane.
5. Metamerism is used for animals in which similar body segments and organ systems are serially repeated one after the other.

Final answer: Ascaris is characterized by the presence of neither true coelom nor metamerism