Vertebrates
animals having a vertebral column, members of the phylum chordata, subphylum vertebrata comprising mammals, birds, reptiles, amphibians, and fishes.
Dictionary > Vertebrates
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Amphibians & Early Reptiles
Obtaining air outside an aquatic environment required species to acquire suitable adaptations, and this was the case of amphibians. However, they were limited by their inability to inhabit drylands. Apparently, the early reptiles were able to do so. To learn more about the evolution of amphibians and reptiles, read this tutorial...
Mammalian Ancestors
Mammals are a diverse group of organisms, where most of them develop their offspring within the uterus of the mother. Over time, mammals have diversified into the placentals and the marsupials. Get a better understanding of how the mammals became dominant based on natural selection and geological events as elucidated in this tutorial...
