Answer:
False.
Explanation:
Sharks are classified as vertebrates, meaning they have a backbone. A shark's backbone is not really made out of bone it is cartilage.
Sharks skeleton is made of cartilage instead of bones to have a lighter weight which allows them to go up and down quickly in the ocean without a lot of effort to stay afloat. Cartilage is robust but not as dense as bone which gives them a great flexibility that allows them bending much easier than bony fishes.
