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well they have a backbone and no exoskeleton
A vertebrate is an animal with a backbone (spine) and an invertebrate has no backbone, usually it has an exoskeleton.
No
No, cockroaches, like all insects, are invertebrates and have an exoskeleton.
Katydids are insects and have an exoskeleton. They do not have a backbone.
They don't have a backbone. They have an exoskeleton.
No, it has an exoskeleton.
A tiger shark has a backbone
No. A good example is humans; Humans certainly do have a backbone, but no exoskeleton (well, I don't, anyway).
They have an exoskeleton, which is their "backbone"
Invertebraes: jellyfish,sponges,squid
No bones at all, backbone or otherwise. They have an exoskeleton (shell)