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!

the diploid number of chromosomes is sometimes represented by the symbol 2n. for the fruit fly, the diploid number is 8, which can be written as 2n = 8, where n represents twice the number of chromosomes in a sperm or egg cell.

this is more of a statement than a question. is there answers to go along with this, or is it opinion based?