Molecular data confirm that cnidarians branched off from the rest of animals before ____________ evolved.
A)echinoderms
B)Porifera
C)mollusks
D)bilaterial symmetry
E)arthropods

Question

Quizplus · Accepted Answer

Bilateral symmetry is a defining characteristic of most animal phyla, including echinoderms, porifera, mollusks, and arthropods. Therefore, if cnidarians branched off before bilateral symmetry evolved, then options A, B, C, and E are not correct.

Molecular Data Confirm That Cnidarians Branched Off from the Rest