Which layer of earths atmosphere, is furthered this away from the surface of the earth

In a lab, scientists grew several generations of offspring of a plant using the method shown. what conclusion can you make about the offspring? a. they formed from meiosis and mitosis. b. they have half the number of chromosomes as their parent. c. they have low genetic variability among them. d. they will be able to reproduce only after they grow flowers.

As scientist had investigated evolution from a variety fields they have found

Can yall plz me on this question im having a hard time think about it