Which of the following is a characteristic of adult echinoderms?
A)secondary radial symmetry
B)spiral cleavage
C)gastrovascular cavity
D)exoskeleton
E)lophophore

Question

Quizplus · Accepted Answer

Adult echinoderms exhibit secondary radial symmetry, meaning they have a five-part body plan with similar structures arranged radially around a central axis. This is a characteristic unique to echinoderms and sets them apart from other animal groups. Spiral cleavage is a characteristic of some groups of animals during their embryonic development, but is not a characteristic of adult echinoderms. Gastrovascular cavities are found in cnidarians and some other animal groups, but not echinoderms. Exoskeletons are found in some animal groups, but not all echinoderms have them. Lophophores are found in certain groups of aquatic invertebrates, such as bryozoans and phoronids, but not in echinoderms.

Which of the Following Is a Characteristic of Adult Echinoderms