Question

What major animal group replaced dinosaurs and reptiles in the Cenozoic era?


lobe-finned fishes


birds


mammals


amphibiansJ

Answer 1

Mammals replaced dinosaurs and reptiles as the dominant terrestrial animals in the Cenozoic Era. After the mass extinction event that wiped out the non-avian dinosaurs at the end of the Cretaceous period, mammals diversified and evolved into a variety of forms, becoming the primary land animals.