Question

Pseudocoelom is the body cavity of:

• A. Flat worms
• B. Earthworms
• C. Round worms
• D. Acorn worms

Hint:

Pseudocoelomates like roundworms have a cavity that is not fully lined with mesoderm. Earthworms, in comparison, have a coelom that is fully lined.

Answer 1

The Correct Option is C

The body cavity of round worms is called a pseudocoelom, which is partially lined by mesoderm, whereas flatworms do not have a true body cavity. Earthworms, in contrast, possess a true coelom.