Documents How did amphibians, such as frogs, trade their tails for legs?

By: Debra Cunningham Long ago, more than 400 million years ago, in what humans call the Devonian period, Fergie Frogâs ancestor, Leo Loberman, lived peacefully with his…

Documents Early Tetrapods and Modern Amphibians Chapter 25.

Early Tetrapods and Modern Amphibians Chapter 25 Early Tetrapods Tetrapods are gnathostomes that have limbs and feet. Tetrapods are a monophyletic group. One of the most…