1. Plants take in water from their roots through the process of osmosis [from the soil (high water potential) into the root cells (lower water potential)].
2. Water is pulled up from the roots in the xylem as a column of water
- due to the tension caused by water loss from the leaves and the cohesion between the water molecules.
3. Stomata allow the uptake of CO2 for photosynthesis.
- When stomata are open, water evaporated from the spongy mesophyll can diffuse out of the leaf down the water potential gradient.
REMEMBER: As water leaves the plant, this creates a suctioning effect on the water in the xylem vessels by the leaves 
You may be interested in
© 2017 MyExpedio.com