They need skeleton for strength , support ,firmness of body and in most of the cases in some bones ,bone marrow helps in the formation of blood .e.g. human beings.
If you don't know about themyou will be that much dumber.
Snakes are vertebrates.
vertebrates
A toucan is a bird, and all birds are vertebrates.
Dolphins are vertebrates.
They have a skeleton & are therefore Vertebrates
Ostrich's are vertebrates as they have a spine.
Pelicans are birds and, like all birds, they are vertebrates. Pelicans have a backbone and an internal skeleton.
There are both vertebrates(things with backbones) & non-vertebrates(animals without backbones).
whyy would u need to know this?? #FREAK
ha ha ha
vertebrates have a backbone invertebrates don't