Question

The following is/are exclusively associated with the pulling of water in vessels by creating a negative pressure, except:

• A. Cohesion and adhesion
• B. Root pressure
• C. Capillarity and tensile strength
• D. Transpiration

Answer 1

The correct option is B Root pressure

When active transportation of ions takes place from soil to vascular bundles in roots, water also moves because of potential gradient. This increases pressure inside the xylem which results in a positive pressure called root pressure. It is responsible for pushing of water to a small height.
Except root pressure, all three are exclusively associated with the pulling of water in vessels by creating a negative pressure.