I will give brainliest for the best answer

Well, I think the best answer will be is How the environment has changed over time, and How life forms in a certain environment have changed over time. Because how the earth surface has changed over time, Because its kinda true but not really. And how the surrounding rock layers have changed over time, Its not really true because the environment change in a certain times of forms of life. Good Luck!

not sure if this what   you'r looking for would be percent composition

the offspring would all be white. if the parents are both white flowers then they have the genotype rr, which when crossed results in an all white punnet square.