When amoeba is placed in a hypertonic medium, it shrinks. Why does this happen?

Due to exosmosis

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Due to endosmosis

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Due to both

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None of the above

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Solution

The correct option is A Due to exosmosis
If amoeba is kept in hypertonic solution then exosmosis occurs in which the water molecules move outward from cell of lower solute concentration to surrounding medium of higher solute concentration through the cell membrane. Due to exosmosis, amoeba will shrink.
Therefore, option A is correct.

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Raisins and apricots are plant cells but they swell and shrink when they are put in hypertonic and hypotonic.How does this happen ?

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