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Sharks

The vertebrate with the fewest bones are probably sharks (and relatives), which have a skeleton made mostly of cartilage; only their jaws are bone. The vertebrate with the fewest bones are probably sharks (and relatives), which have a skeleton made mostly of cartilage; only their jaws are bone.

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This is my answer it is D :]
Sharks The vertebrate with the fewest bones are probably sharks (and relatives), which-example-1
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