The movement of a substance from an area of low concentration to an area of high concentration is called a) osmosis b)diffusion c)passive transport d) active transport

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Osmosis is the diffusion of a solvent through a semipermeable membrane from a region of low solute concentration to a region of high solute concentration. ... Osmosis is an important topic in biology because it provides the primary means by which water is transported into and out of cells.