Which sphere is not a part of the cycling of oxygen through earths systems

What did hunter gathers do to alter the environment?

Why does miranda have that particular vision of dr hildesheim answer?

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.