No, worms are invertebrates, meaning they have no backbones, while arachnids are the spiders, mites and scorpions.
Squid, octopus, worms, snails, caterpillars, crab, starfish, jellyfish, spiders, sponges, lice, ants, mites, and flies have no backbones.
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
no they don't have backbones
The backbones are part of the skeleton.