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The diffusion of water across a semi-permeable membrane is called ______.

A. Permeability
B. Active transport
C. Tonicity
D. Osmosis

Answer :

Final answer:

Osmosis is the diffusion of water across a semipermeable membrane from an area of low solute concentration to an area of high solute concentration. It plays a crucial role in maintaining cell shape, regulating cell volume, and assisting in nutrient and waste product transport.

Explanation:

Osmosis is the diffusion of water across a semipermeable membrane from an area of low solute concentration to an area of high solute concentration. It is a passive process that does not require energy. The movement of water occurs in order to equalize the solute concentration on both sides of the membrane.

For example, if you place a cell in a hypertonic solution (higher solute concentration outside the cell), water will move out of the cell through osmosis, causing the cell to shrink. Conversely, if you place a cell in a hypotonic solution (lower solute concentration outside the cell), water will move into the cell through osmosis, causing the cell to swell.

Osmosis plays a crucial role in various biological processes, such as maintaining cell shape, regulating cell volume, and assisting in the transport of nutrients and waste products.

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