Ascent of Sap

Q.

How do plants use capillary action?

Q. The upward movement of sap containing water and dissolved minerals from the root cells to xylem is called the ascent of sap.

1. True
2. False

Q.

Some of the nitrogen travel as inorganic ions, but the bulk of it is carried in the organic form as amino acids and related compounds.

1. True

2. False

Q. Sort the following structures involved in the ascent of sap. (top to bottom)

1. leaf
2. Cortex
3. Xylem
4. Root hair

Q. The structure of the root-hair is quite suitable for absorbing water from the soil.
Briefly explain.

Q. Upward movement of water in plants is referred to as

1. Translocation
2. Suction
3. Flight
4. Ascent of sap

Q. Sort the following structures involved in the ascent of sap. (top to bottom)

1. Leaf
2. Cortex
3. Xylem
4. Root hair

Q.

The major driving force for transport of water through xylem during the day is _________ and during the night, it is ________.

1. root pressure, transpiration

2. transpiration, root pressure

3. diffusion, osmosis

4. active transport, transpiration

Q.

Define the terms.

Ascent of sap

Q.

Which of the following contributes most to transport of water from the ground to the leaves of a tall tree?

1. Cohesion of water

2. Transpiration pull

3. Root pressure

4. Capillary rise of water in xylem

Q.

Which of the following elements is not remobilized from one part of the plant to another?

1. N & P

2. P, N & K

3. C A & S

4. K & P

Q. Which one occurs in insignificant amount in xylem sap

1. Water
2. Nitrate
3. Phosphate
4. Sugar