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

The group of organisms that has the derived characteristics of true tissues, bilateral symmetry, and a pseudocoelom is roundworms. Roundworms, or nematodes, possess these features, distinguishing them from other groups like sponges (which lack true tissues) and annelids and chordates (which have a coelom rather than a pseudocoelom).