Organisms must be able to adapt to a changing external and internal environment. An organism's ability to maintain a stable internal environment is known as homeostasis. How does a cell's membrane help an organism maintain homeostasis? A. Cell membranes control the substances that enter or leave cells. B. Cell membranes use a large portion of the cell's energy supply. C. Cell membranes protect the cell organelles from large doses of radiation. D. Cell membranes directly control the temperature of the cell.
I believe the answer is A because the job of the cell membrane is to regulate the passage of materials into and out of the cell. Hope this helps. (Please mark this brainliest, I would really appreciate it) Thanks!