Vertebrates came first... all of those other creatures are vertebrates..
prior to the evolution of the spine (vertebrae) there were no fish, reptiles, mammals birds... nothing like them..
Amphibians, as reptiles came from them.
very small marine life
Reptiles.
invertebrates
They were the original form of life and they came before vertebrates.
vertebrates and invertebrates different?
They are vertebrates.
Vertebrates have spinal chord and invertebrates don't.
Vertebrates have spines & invertebrates do not have spines.
vertebrates and invertebrates
Invertebrates.
invertebrates
vertebrates
Vertebrates.
all vertebrates have endoskeleton but not all invertebrates do