6. Transpiration is a critical part of the water cycle. Transpiration is the loss of water vapor through the leaves. This loss of water cools the plant down. How are the xylem and stomata involved in this process?

The correct answer is: The xylem and stomata are involved in the process of transpiration. The stomata are small openings on the surface of the leaves that allow for the exchange of gases. When the stomata open to allow carbon dioxide in for photosynthesis, water vapor is also released into the atmosphere. The xylem is a network of vessels that transport water and nutrients from the roots to the rest of the plant. As water evaporates from the leaves, it creates a negative pressure in the xylem vessels, causing water to be pulled up from the roots to replace the lost water. This process of transpiration helps to cool the plant and also aids in the transport of water and nutrients.