Along a rocky tide pool, you discover an animal with the following characteristics: a hemisphere-shaped body covered with spines that move when you touch the animal. This animal would belong to the _______ group.

Question

Quizplus · Accepted Answer

The hemisphere-shaped body and spines that move when touched indicate that this animal is an echinoderm, specifically an echinozoan. Echinoderms have a radial symmetry and spiny, calcified skin. Crinoids have feathery arms and a cup-shaped body, asterozoans have a star-shaped body, and hemichordates have a worm-like body.

Along a Rocky Tide Pool, You Discover an Animal with the Following