Development which freed land vertebrates from water was

Which is not a vertebrate

Gill cells and notochord appear in the embryonic development of all vertebrates from fishes to mammals. This supports the theory of

Gill clefts and notochord appear in the embryonic development of all vertebrates from fishes to mammals. This supports the theory of

The greatest evolutionary change enabling the land vertebrates to be completely free from water , was the development of

The greatest evolutionary change enabling the land vertebrates to be completely free from water , was the development of

The greatest evolutionary change enabling the land vertebrates to be completely free from water , was the development of

The greatest evolutionary change enabling the land vertebrates to be completely free from water , was the development of