Understanding Mammals, Birds, Reptiles, Fish, and Amphibians
A dolphin, eagle, crocodile, salmon, and frog may look completely different, but they have one important thing in common: they are all vertebrates. Vertebrates are animals connected by a basic body plan that includes a backbone or vertebral column at some stage of development. From there, however, their lifestyles can become dramatically different. Some breathe … Read more
