Which of the following can have long, movable spines?
A)class Crinoidea (sea lilies and feather stars)
B)class Asteroidea (sea stars)
C)class Ophiuroidea (brittle stars)
D)class Echinoidea (sea urchins and sand dollars)
E)class Holothuroidea (sea cucumbers)

Question

Quizplus · Accepted Answer

Class Echinoidea (sea urchins and sand dollars) can have long, movable spines as a part of their skeletal structure.

Which of the Following Can Have Long, Movable Spines