Root Pressure

Q. Root pressure is maximum when:

1. Transpiration is high and absorption is very low
2. Transpiration is very low and absorption is high
3. Transpiration is very high and absorption is also high
4. Both transpiration and absorption are low

Q.

Explain two manifestations of root pressure.

Q. Root pressure is enough to transport water in small trees and bushes.

1. True
2. False

Q. Root pressure is enough to transport water in small trees and bushes.

1. True
2. False

Q. Identify the process where root pressure is not involved -
A. Oozing out of sap from the cut end of stem.
B. Loss of water vapour from the aerial parts of plant.
C. Reestablishment of continuity of water column in the xylem which often breaks due to tension.
D. Water loss in liquid phase from vein endings of leaves.

1. A $\&$ C
2. B $\&$ D
3. B alone
4. C $\&$ D

Q. Which among the following factors function in developing root pressure?

1. Low osmotic potential in soil
2. Passive absorption
3. Increase in transpiration
4. Active absorption

Q. Identify the process where root pressure is not involved -
A. Oozing out of sap from the cut end of stem.
B. Loss of water vapour from the aerial parts of plant.
C. Reestablishment of continuity of water column in the xylem which often breaks due to tension.
D. Water loss in liquid phase from vein endings of leaves.

1. A $\&$ C
2. B $\&$ D
3. B alone
4. C $\&$ D

Q.

The pressure developed in the root xylem due to entry of water followed by the active transportation of mineral ions is called -

1. Osmotic pressure

2. Root pressure

3. Turgor pressure

4. Wall pressure

Q. Which among the following factors function in developing root pressure?

1. Low osmotic potential in soil
2. Passive absorption
3. Increase in transpiration
4. Active absorption

Q. The following is/are exclusively associated with the pulling of water in vessels by creating a negative pressure, except:

1. Cohesion and adhesion
2. Root pressure
3. Capillarity and tensile strength
4. Transpiration