Answer:
1.An animal that has a backbone and skeletal system is called a vertebrate.The 5 groups of vertebrates (animals that have a backbone) are fish, amphibians, reptiles, birds, and mammals.
2.Invertebrates - animals without a backbone. ... Sponges, corals, worms, insects, spiders and crabs are all sub-groups of the invertebrate group - they do not have a backbone.
3.The five most well known classes of vertebrates (animals with backbones) are mammals, birds, fish, reptiles, amphibians. They are all part of the phylum chordata -- I remember "chordata" by thinking of spinal chord. There are also a lot of animals without backbones.
4.BIRDS
5.Amphibians are vertebrates (animals with backbones) which are able, when adult, to live both in water and on land
