Question

Absorption of water from soil by dry seeds increases the thus helping seedlings to come out of soil.

Answer 1

Imbibition pressure:

• Imbibition is a special type of diffusion, observed when water is absorbed by colloids causing them to increase in volume.
• The cellulose present in the cell wall of the seed imbibes water and develops a pressure called imbibition pressure.
• This pressure helps in breaking off the seed coat and thus leading to germination.

Final answer: Imbibition pressure