Question

The most important forces for the ascent of sap in plants are?

• A. Imbibition and capillary
• B. Suction pressure and cohesion
• C. Capillary and root pressure
• D. Root pressure and pulsation

Answer 1

The correct option is C Capillary and root pressure

• The process by which water and minerals translocate from base to apex of the plant is known as the ascent of sap. It takes place through complex tissue xylem. Most important forces for the ascent of sap are; root pressure and capillary action.
• Active transport of water takes place through xylem by a pressure called root pressure. It is responsible for pushing up water to small heights in the stem.
• The tubes in the plant stem are very tiny and the movement of water through tiny tubes is called capillary action. This occurs when the adhesion is stronger than the cohesion. Water molecules are naturally attracted to each other.

Hence, the correct answer is option C.