Sagot :
1.five main vertebrate groups alive today: the fishes, amphibians, reptiles, birds, and mammals.
2.nasa picture

Answer:
1 vertebrates
five major groups: fishes, amphibians, reptiles, birds, and mammals. Fishes are almost all entirely aquatic
2 Invertebrates
are animals that neither possess nor develop a vertebral column (commonly known as a backbone or spine), derived from the notochord. This includes all animals apart from the chordate subphylum Vertebrata.