The Ophiuroids Have No

Question

The ophiuroids have no
A)pedicellariae.
B)papulae.
C)anus.
D)all of these

Accepted Answer

Ophiuroids, also known as brittle stars, lack pedicellariae (small pincer-like structures found in some other echinoderms for defense and cleaning) and papulae (respiratory structures found in sea stars and sea urchins). They also do not have a true anus, but instead discharge waste through an opening on their oral side called the madreporite. Therefore, choice D (all of these) is the correct answer.