No there is more with backbones
it has 2 backbones
No backbones
Pigs do have backbones.
All snakes have backbones.
The backbones are part of the skeleton.
all fishes have backbones
no they don't have backbones
no myriapods don't have backbones
Yes, they do.
None. All snakes have backbones.
No, they have an exoskeleton