Although echinoderms appear to have radial symmetry, their bilateral origins are revealed by
A) the shape of their water vascular system.
B) the symmetry of their larvae.
C) the development of an oral/aboral surface.
D) their baso-lateral anatomy.
E) their five-rayed symmetry.

Question

Quizplus · Accepted Answer

Echinoderms, despite their adult radial symmetry, exhibit bilateral symmetry during their larval stages, indicating their bilateral evolutionary origins.

Although Echinoderms Appear to Have Radial Symmetry, Their Bilateral Origins