A key derived character of sharks and rays that distinguishes them from ray- finned fishes is

Question

Quizplus · Accepted Answer

Sharks and rays have a skeleton made of cartilage, while ray-finned fishes have a skeleton made of calcified bones. Jaws and swim bladders are present in both shark/ray and ray-finned fish groups, and vertebrates are present in all species of fishes. Therefore, the key derived character that distinguishes sharks and rays from ray-finned fishes is their cartilaginous skeleton.

A Key Derived Character of Sharks and Rays That Distinguishes