Question

How do water get absorbed continuously by roots?

• A. Osmosis
• B. Diffusion
• C. Root pressure
• D. Imbibition

Answer 1

The correct option is C

Root pressure

Root pressure

Water is constantly being absorbed by the roots due to the negative water potential in the root cells. This movement of water into the roots can cause the water pressure inside the roots to become high, resulting in a force that 'pushes' water up the stem xylem.

Root pressure occurs in the xylem of some vascular plants when the soil moisture level is high either at night or when transpiration is low during the day.