Question

During day period, .......... and ......... helps in the upward movement of sap from roots to the leaves.

• A. Reverse osmosis and diffusion
• B. Facilitated diffusion and osmosis
• C. Cohesive force and transpiration pull
• D. None of the above

Answer 1

The correct option is C Cohesive force and transpiration pull

Most researchers agree that during day time water is mainly pulled through the plant and that the driving force for this process is transpiration from the leaves. This is referred to as the cohesion-tension-transpiration pull model of water transport. The cohesion is the mutual attraction between water molecules, which helps in the formation of a continuous water column inside the vascular tissues of the plant.

So, the correct answer is option C.