A Unique Characteristic of Echinoderms Is

Question

A unique characteristic of echinoderms is
A)the endoskeleton of plates or ossicles.
B)the water-vascular system.
C)pedicellariae.
D)all of these

Accepted Answer

All of these are unique characteristics of echinoderms. The endoskeleton of plates or ossicles provides support for the body, while the water-vascular system allows for movement and feeding. Pedicellariae are tiny pincer-like structures that help protect the echinoderm's surface from parasites and debris.