Movement of water/dissolved ions in xylem

Question 1

What is cohesion-tension theory

Answer 1

Water evaporates
Negative pressure is created (tension)
Mass flow movement begins (transpiration stream)
There is cohesion between water molecules (H bonds)

Question 2

What is root pressure theory

Answer 2

Water is moved by ATP from endodermal cells into the xylem cells.
Root pressure is created as a result
This helps water move up plant