Living cells placed in an isotonic solution (0.9% saline) retain their size and shape. This is based on the concept of

Osmosis.

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Diffusion.

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Facilitated diffusion.

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Transpiration.

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Solution

The correct option is B Osmosis.
Osmosis is the concept that involves the moment of water molecules inside and outside of the cell. Isotonic solution is the one in which the concentration of solute and water molecules are in equilibrium. If the cell is placed in isotonic solution the net change will be zero. So, the cells retain their size.

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Similar questions

The following list indicates certain molecules/ions and their mechanism of transport across the cell membrane. Determine the correct pair(s) from the list.

I. Diffusion - $N a^{+}$

II. Active transport - Amino acids

III. Osmosis - Water

IV. Facilitated diffusion - Glucose

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