Question

1. which group has a true coelom?

annelds have a true coelom.

platyhelminths have a true coelom.

platyhelminths are segmented.

nematodes lack a coelom.

Explanation:

• Annelids (segmented worms) have a true coelom. A true coelom is a body cavity lined by mesoderm on both sides.
• Platyhelminthes (flatworms) are acoelomate (lack a coelom).
• Nematodes (roundworms) have a pseudocoelom (not a true coelom).

Answer:

Annelids have a true coelom.