Q1. [1] straightforward initial-understanding
During the day, when stomata are open, which is the major driving force for upward movement of water in xylem?
(a) Root pressure
(b) Transpiration pull
(c) Osmotic pressure of phloem
(d) Active transport by companion cells
- a Root pressure
- b Transpiration pull
- c Osmotic pressure of phloem
- d Active transport by companion cells