What drives the flow of water through the xylem?

Question

Quizplus · Accepted Answer

The flow of water through the xylem is driven by transpiration, which is the evaporation of water from the leaves. As water evaporates from the leaves, it creates a negative pressure or tension in the xylem, causing water to move up from the roots to replace the lost water. This process is known as transpiration pull and is responsible for the movement of water and minerals through the xylem. Passive transport by the endodermis, the number of companion cells in the phloem, and active transport by tracheid and vessel elements do not drive the flow of water through the xylem.

What Drives the Flow of Water Through the Xylem