Cells can use osmosis as a defence mechanism through increase in osmotic pressure leading to bursting of foreign particles.
Osmosis is the movement of water molecules across the a semipermeable from regions of low solute concentration to regions of high solute concentration.
Water molecules can move across cell membranes into foreign particles until the particles burst.
Also, cells can neutralize the effect of foreisgn particles by diluting their concentrations through osmosis.
Therefore, osmosis can serve as a defence mechanism through increase in osmotic pressure.
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