Which of these, if True, would support the claim that the ancestral cnidarians had bilateral symmetry?
1) Cnidarian larvae possess anterior-posterior, left-right, and dorsal-ventral aspects.
2) Cnidarians have fewer Hox genes than bilaterians.
3) All extant cnidarians, including Nematostella, are diploblastic.
4) Beta-catenin turns out to be essential for gastrulation in all animals in which it occurs.
5) All cnidarians are acoelomate.
A)1 only
B)1 and 4
C)2 and 3
D)2 and 4
E)4 and 5

Question

Quizplus · Accepted Answer

The presence of anterior-posterior, left-right, and dorsal-ventral aspects in cnidarian larvae (1) suggests a bilateral symmetry, supporting the claim. Beta-catenin's role in gastrulation (4) is a fundamental process in forming body plans, including bilateral symmetry.

Which of These, If True, Would Support the Claim That