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(C) Osmosis is the spontaneous diffusion of water across a semi-permeable membrane. The movement of water molecules is influenced by both the chemical

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The net direction and rate of osmosis depend upon both the pressure gradient and concentration gradient.

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(C) Osmosis is the spontaneous diffusion of water across a semi-permeable membrane. The movement of water molecules is influenced by both the chemical potential gradient (concentration gradient) and the pressure gradient. The net direction of water movement is determined by the water potential,which is the sum of solute potential (related to concentration) and pressure potential. Therefore,both the net direction and the rate at which osmosis occurs are dependent on these two factors.

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