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 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. the answer is a.

How do temperature and salinity affect deepwater currents? they create changes in wind direction, moving denser water in the same direction as the wind and causing the deepwater circulation patterns found in the ocean. as temperatures and salinity levels of water increase, the water rises to the surface where it creates currents as it moves to colder regions. they create density differences that cause dense deepwater currents to flow toward the equator where they displace less dense, warmer water above them. they equalize the forces on undersea currents caused by the coriolis effect as they replace more dense water with less dense water.