Geologic Time Quick Check

Question

1 of 51 of 5 Items
Question
Which forms of life were dominant in the Mesozoic era?(1 point)
Responses

reptiles
reptiles

mammals
mammals

birds
birds

one-celled animals

Answer 1

The dominant forms of life in the Mesozoic era were reptiles. This era is often referred to as the "Age of Reptiles," during which dinosaurs and other reptiles thrived. Birds also evolved from theropod dinosaurs during this time, but reptiles were the dominant group. Mammals were present but not the dominant life forms during the Mesozoic. One-celled animals, while always present, were not the dominant forms of life either. Therefore, the best response is reptiles.