The echinoderms that most closely resemble fossil forms are the
A)crinoids.
B)ophiuroids.
C)holothuroids.
D)asteroids.
E)echinoids.

Question

Quizplus · Accepted Answer

Crinoids, also known as “sea lilies,” have changed little in their 500-million-year history and are considered living fossils. They were abundant in the Paleozoic Era and have a unique feeding structure that is well-preserved in the fossil record. The other echinoderm groups mentioned have evolved more significantly since their fossil ancestors.

The Echinoderms That Most Closely Resemble Fossil Forms Are the