Which statement about arthropod skeletons is true?

Question

Quizplus · Accepted Answer

Arthropods have a rigid external skeleton made of chitin, which provides protection and support, and serves as an attachment point for muscles. Muscles attach to the cuticle and create movement by contracting and pulling against the rigid structure.

Answer: B
 The cuticle of arthropods is secreted by a single layer of cells called the epidermis, which is located external to the cuticle. The cells secrete chitin and other materials that form the cuticle.

Answer: C
 Arthropods have jointed appendages and an internal network of muscles that create movement by pulling against the rigid exoskeleton. The muscles are connected to the internal skeleton, not the external cuticle.

Answer: D
 The joints of the arthropod cuticle contain flexible regions that allow movement, but they do not contain stiffening materials. Instead, these regions have specialized structures that absorb and distribute stress.

Answer: E
 Arthropods molt to grow or repair damaged cuticle. During molt, cells under the old cuticle secrete a substance that dissolves chitin, allowing the animal to shed its old exoskeleton and form a new one.

Which Statement About Arthropod Skeletons Is True