Question

Which of the following is an example of imbibition?

• A. Exchange of gases in stomata.
• B. Opening of stomata.
• C. Uptake of water by root hair.
• D. Swelling of seed when put in soil.

Answer 1

The correct option is D

Swelling of seed when put in soil.

Imbibition is the absorption or adsorption of water by certain colloids, with resultant swelling of the tissues, i.e., seeds. Imbibition is responsible for the swelling of seeds when put in soil, or when mature seeds are soaked in water at room temperature.