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Multiple Choice
In cartilaginous fish, which part of their body contains the only real bone?
A
Teeth
B
Fins
C
Skull
D
Vertebrae
Verified step by step guidance
1
Understand the anatomy of cartilaginous fish: Cartilaginous fish, such as sharks and rays, have skeletons made primarily of cartilage rather than bone.
Identify the unique feature of cartilaginous fish: Despite having a cartilaginous skeleton, these fish do have one part of their body that contains real bone.
Consider the options provided: Teeth, Fins, Skull, Vertebrae.
Recall that teeth are composed of dentin and enamel, which are mineralized tissues similar to bone, making them the only real bone-like structures in cartilaginous fish.
Conclude that the teeth of cartilaginous fish are the only part of their body that contains real bone.