Sap ascends in woody plants because of the root pressure and
Correct answer: A. Transpiration pull
- A. Transpiration pull
- B. Capillarity
- C. Molecular adhesion
- D. Photosynthesis
Explanation
In woody plants, the primary mechanism responsible for the ascent of sap is the transpirational pull. Transpiration, the evaporation of water from the leaves, creates a negative pressure or tension in the xylem vessels. This tension pulls water molecules upward from the roots to replace the lost water, resulting in a continuous flow of sap.
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