A) positive root pressure
B) turgor pressure
C) pressure gradient
D) negative root pressure
Correct Answer: A
Solution :
[a] A pressure that is responsible for pushing up water to small height in the stem is called positive root pressure. Root pressure is a type of osmotic pressure. It occurs within the cells of a root system that causes sap to rise through a plant stem to the leaves. Root pressure occurs in the xylem of vascular plants when the soil moisture level is high either at night or when rate of transpiration is low during the day.
You need to login to perform this action.
You will be redirected in
3 sec
