what is osmosis and diffusion.
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Diffusion is a spontaneous movement of particles from an area of high concentration to an area of low concentration. ... Osmosis is the spontaneous net movement of water across a semipermeable membrane from a region of low solute concentration to a more concentrated solution, up a concentration gradient.
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The movement of water molecules (liquid) through such a selectively permeable membrame it is called osmosis.
some substances like CO2 and o2 can move across a cell membrane it is called diffusion.
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