Translocation of Minerals

Q.

Assertion (A): Much of the nitrogen and small amounts of phosphorus and sulphur are carried in the organic form through xylem.

Reason (R): Xylem transports only inorganic nutrients and phloem transports only organic nutrients.

1. Both A $\&$ R are true and R explains A

2. Both A & R are true and R does not explain A

3. A is true and R is false

4. Both A & R are false

Q. Translocation can be best described as

1. ascent of water
2. transport of substances through xylem and phloem over long distances
3. movement of food by phloem
4. loss of water through stomata

Q. Mineral ions diffuse out of the xylem vessels at the fine vein ending and are passively taken up by the cells.

1. True
2. False

Q. Phloem unloading refers to

1. movement of sucrose from companion cells to living sieve tube cells
2. movement of solutes from companion cells into sink
3. movement of sucrose out of the phloem sap into the cells
4. sugar diffuse into the companion cells of the phloem through plasmodesmata

Q. All mineral are passively absorbed by the roots.

1. True
2. False

Q.

Assertion (A): Much of the nitrogen and small amounts of phosphorus and sulphur are carried in the organic form through xylem.

Reason (R): Xylem transports only inorganic nutrients and phloem transports only organic nutrients.

1. Both A $\&$ R are true and R explains A

2. Both A & R are true and R does not explain A

3. A is true and R is false

4. Both A & R are false

Q.

Which of the following plant organs act as sink for different minerals?

1. Apical and lateral meristems

2. Young leaves and storage organs

3. Developing flowers, fruit and seeds

4. All of these

Q.

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

1. Phosphorous

2. Calcium

3. Nitrogen

4. Potassium