Question

Which one of the following is a driving force for the process of passive absorption of water in roots?

• A. The increase in imbibitional pressure in root cells
• B. Root pressure
• C. Activity of aquaporins
• D. Transpiration in leaves

Answer 1

The correct option is D Transpiration in leaves

Transpiration in leaves creates transpiration pull. This transpiration pull creates the pulling force, which lifts water. Water is lifted as a continuous column because of cohesion force between water molecules and the adhesion force between water molecules and vascular elements which leads to movement of water from the surrounding soil into the roots without the expenditure of energy.

So, the correct answer is option D.