Question

According to the geological time scale,

mammals
evolved after the first insects evolved.

Answer 1

You are correct

Step-by-step explanation:

According to the geological time scale, mammals evolved after the first insects evolved.

Answer 2

after the evolution of insects the first four legged species or the tetrapods evolved in shallow freshwater habitats from the intermediate species approximately 397 million years ago.

Step-by-step explanation:

the tetrapods went on conquering the land giving rise to amphibians, reptiles, mammals and birds.