What process causes water to enter or leave a cell?
It is by the diffusion of water which is more commonly termed as osmosis. Diffusion is the movement of molecules from a region of higher concentration to a region of lower concentration. Osmosis is the movement of WATER MOLECULES from a region of higher concentration to a region of lower concentration. One thing more, the opposite process of diffusion is active transport. It is the movement of molecules from a region of lower concentration to a region of higher concentration. Thus, it requires a lot of energy which is supplied by the plant cells. For more info, you can visit this website: http://www.emc.maricopa.
