Yes, all sharks have a vertebral column, but each vertebrae consist of two cartilagenous tubes, not solid bone like tissue.
Some very large extinct megatoothed sharks, like C. megalodon, C. chubutensis and C. angustidens, had vertebrae so large and hard, with multiple layers of calcification, that they could fossilize almost as well as a bone vertebrae.
Yes, all mammals are vertibrates.
Yes, elephants have backbones, so are vertibrates.
yes, it is a mamal and all mamals are vertibrates and all vertibrates have backbones
no
Backbones
vertibrates
Of course they are!
yes
Yes they are vertabrates. They are fish and fish are vertibrates. Fish, Reptiles, Amphibians, Mammals, and birds are all vertibrates.
they are vertibrates
Yes.
Jawless fish