The first terrestrial vertebrates (with an amphibian life cycle)are represented by fossils that are Late ________ in age.
A)Cambrian
B)Devonian
C)Permian
D)Triassic

Question

Quizplus · Accepted Answer

The first terrestrial vertebrates with an amphibian life cycle are represented by fossils that are Late Devonian in age, specifically around 365 million years ago. This group is known as the tetrapods and includes ancestors of modern amphibians, reptiles, birds, and mammals. The Cambrian is too early for this group, the Permian is too late, and the Triassic is when reptiles began to diversify but not when the first terrestrial vertebrates appeared.

The First Terrestrial Vertebrates (With an Amphibian Life Cycle)are Represented