1. Animals that have a backbone are called vertebrates.
2.The five groups of vertebrates are: mammals, birds, reptiles, amphibians, fish.
3. The vertebrates who've got scales on their bodies are fish and reptiles.
4. The vertebrates that aren't born from eggs are mammals.
5. The vertebrates that are warm-blooded are mammals and birds.
6. The vertebrates that are cold-blooded are reptiles, amphibians and fish.