yes they do, there mammals
They have backbones so they are vertebrates
All bears have backbones and therefore, by definition, are vertebrates. Just as you are.
All animals with spines are vertebrates, and polar bears have spines.
Yes. Like all mammals, bears are vertabrates.
No there is more with backbones
No backbones
Pigs do have backbones.
it has 2 backbones
All snakes have backbones.
Yes, they do.
no myriapods don't have backbones
all fishes have backbones