Question

Explain the term:

Ascent of sap

Answer 1

1. Ascent of sap is the upward movement of water and dissolved minerals from the roots to the aerial parts of a plant.
2. This movement occurs through xylem vessels.
3. Water is absorbed from the soil by the root hairs.
4. It then travels upward through the stem to the leaves.
5. The main driving force is transpiration pull caused by the evaporation of water from leaf surfaces.
6. Other forces that help include root pressure and capillary action.
7. The ascent of sap is essential for photosynthesis, cooling, and the transport of minerals in the plant.