Which among the following processes work under the principle of osmosis?

Stirring tea leaves in hot water.

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Filtration of waste materials from blood.

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Opening and closing of stomata.

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Mixing of oxygen with blood while breathing.

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Solution

The correct options are
B Filtration of waste materials from blood.
C Opening and closing of stomata.
$∙$ Osmosis is the process of movement of material from a region of higher concentration to lower concentration through a semi- permeable membrane.
$∙$ Diffusion is the process of movement of molecules from a region of higher concentration to a lower concentration, without the expenditure of energy.

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