Question

Which forms of life were dominant in the Mesozoic era?

Reptiles
Birds
Mammals
One celled animals

Answer 1

During the Mesozoic Era, which lasted from about 252 to 66 million years ago, reptiles were the dominant forms of life. This era is often referred to as the "Age of Reptiles" because it saw the rise and diversification of dinosaurs, as well as other reptiles. While birds (which evolved from theropod dinosaurs) and mammals were also present, they were not the dominant groups during this time. One-celled animals existed, but they were not the dominant life forms either.