Are Characterized by Having a Pseudocoelom

Question

are characterized by having a pseudocoelom.
A) Cnidarians
B) Chordates
C) Roundworms
D) Annelids
E) Arthropods

Accepted Answer

Roundworms, also known as nematodes, are characterized by having a pseudocoelom, which is a body cavity that is not fully lined with mesoderm.