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

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.

Explanation:

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

it will increase due to the time span

there are 35 white marbles

step-by-step explanation:

y- yellow marbles

4y + 5 = 45

subtract 5 from both sides

4y = 40

divide for from both sides

y = 10

plug in 10 to get 40 yellow marbles then subtract by 5 to get 35 marbles

thus there are only 10 yellow marbles