yes if it has a spine, it doesn't matter if it is made of cartilage
Sharks are a type of cartilaginous fish, that is their skeleton is made of cartilage rather than bone. They belong to the vertebrate subphylum of chondrichthyes.
cartilage.
cartilage
cartilage or bone
Yes
No they are made of cartilage
yes; endoskeleton of vertebrates may be either bone or cartilage
Sharks belong to the vertebrate group known as Fish. Specifically, they belong to the vertebrate group known as Chondrichthyes - all sharks and rays - which have skeletons of cartilage rather than bone.
Fish with skeletons made of cartilage are found in the class Chondrichthyes. This group includes sharks, rays, and skates. Cartilage provides these fish with flexibility and strength without the weight of bony skeletons.
Amphibian skeletons are made of bone and cartilage.
Bones cartilage
Amphibians are vertebrates, meaning they have a backbone. The skeletal system is mostly made up of bone, but also contains some smaller portions of cartilage. Not all vertebrates have bone skeletons, Chondrichthyes (sharks, rays etc.) have skeletons made up entirely of cartilage. Amphibians however do not.