During metamorphosis, echinoderms undergo a transformation from motile larvae to a sedentary (or sometimes sessile)existence as adults. What differentiates echinoderm adults, but not their larvae? Adults should
A)be diploblastic.
B)have radial symmetry, or something close to it.
C)lack mesodermally derived tissues.
D)A and B only
E)A, B, and C

Question

Quizplus · Accepted Answer

Echinoderm adults exhibit radial symmetry or pentaradial symmetry, while their larvae have bilateral symmetry.

During Metamorphosis, Echinoderms Undergo a Transformation from Motile Larvae to a Sedentary