Water

Question 1

Define adhesion

Answer 1

When water molecules are attracted to the impermeable walls of xylem tissue

Question 2

What is cohesion?

Answer 2

When the partially positive hydrogen atom of one water molecule is attracted to the partially negative oxygen atom of another water molecule forming a hydrogen bond

Question 3

Describe the cohesion-tension theory of water transport in the xylem

Answer 3

-The loss of water via transpiration decreases the water potential of the mesophyll cells.
- This pulls water up the xylem putting it under tension.
- Inside the column, the water molecules adhere to the walls and are held together by hydrogen bonds