Question

The first mammals evolved during the _____ Period.

Quaternary

Cambrian

Permian

Triassic

Answer 1

not d or a...becuz its dinosaurs period ... confused

Answer 2

If we are picky about which organisms count as true mammals, then mammals first came into existence in the early Jurassic. Mammal-like organisms, which had been becoming more and more like modern mammals, had existed before. Cynodonts, an early ancestor of mammals, arose before the Triassic, in the Permian.

Answer 3

thank you