Question

Figure 1. Model of water movement through the xylem, with magnified models of water movement in the stem and leaf. Which statement describes how water is pulled up through the xylem to the leaves of the plant?

Answer 1

Water is pulled up through the xylem to the leaves of a plant through the processes of transpiration and cohesion.

Step-by-step explanation:

The movement of water through the xylem to the leaves of a plant is facilitated by two main processes: transpiration and cohesion. Transpiration is the process by which water evaporates from the leaves, creating a negative pressure or tension within the xylem. This negative pressure pulls the water molecules upwards. Cohesion refers to the attraction between water molecules, which allows them to stick together and form a continuous chain or column within the xylem. As water is lost through transpiration, more water is drawn up from the roots to replace it due to the cohesive forces.