Question

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 1

The Correct Option is D

To solve the problem, we must understand the basic biological characteristics of Ascaris, a genus of parasitic nematode worms, commonly referred to as roundworms.

Let's analyze each option related to coelom and metamerism:

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

Combining the characteristics of Ascaris, the correct answer is the fourth option: "presence of neither true coelom nor metamerism".