Which class includes cartilaginous fish?

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Multiple Choice

Which class includes cartilaginous fish?

Explanation:
Cartilaginous fish have skeletons made of cartilage rather than bone, which defines their class, Chondrichthyes. This group includes sharks, rays, and chimaeras and is distinguished from other vertebrates by that cartilage-based skeleton. Osteichthyes are bony fishes, Mammalia are mammals, and Agnatha are jawless fishes, so the clue about cartilage directly points to Chondrichthyes.

Cartilaginous fish have skeletons made of cartilage rather than bone, which defines their class, Chondrichthyes. This group includes sharks, rays, and chimaeras and is distinguished from other vertebrates by that cartilage-based skeleton. Osteichthyes are bony fishes, Mammalia are mammals, and Agnatha are jawless fishes, so the clue about cartilage directly points to Chondrichthyes.

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