Question

which group of organisms has the derived characteristics of true tissues, bilateral symmetry, and a pseudocoelom?
sponges
roundworms
annelids
chordates

Explanation:

• Sponges lack true tissues.
• Roundworms (Nematodes) have true tissues, bilateral symmetry, and a pseudocoelom.
• Annelids have a true coelom, not a pseudocoelom.
• Chordates have a true coelom.

Answer:

roundworms