Question

Which pressure is responsible for ascent of sap?

• A. Negative hydrostatic pressure
• B. Positive hydrostatic pressure
• C. Root pressure
• D. All of the above

Answer 1

The correct option is C Root pressure

• In the Root Pressure, the root Xylem vessels absorb the minerals from the soil, as a result, the water potential outside the root increase and inside the root decreases so due to water potential difference water starts entering to the xylem of the root.

So, the correct answer is 'Root pressure'