Earthworms have
A)an exoskeleton.
B)an endoskeleton.
C)a hydrostatic skeleton.
D)a peristaltic skeleton.

Question

Quizplus · Accepted Answer

Earthworms have a hydrostatic skeleton, which means that their muscles work against fluid-filled compartments to produce movement. This is different from an exoskeleton (a hard, outer body covering), an endoskeleton (internal bones), or a peristaltic skeleton (found in certain soft-bodied organisms like jellyfish).

Earthworms Have