I: | The process of translocation through phloem is unidirectional but through xylem, it is bidirectional |
II: | The most readily mobilized elements are phosphorus, sulphur, nitrogen and potassium. |
Phloem sap in the plants mainly consists of :
1. fructose and water
2. fructose and sucrose
3. glucose and water
4. sucrose and water
Which of the following was proved by girdling experiment?
1. | Apoplastic movement of water occurs through intercellular spaces |
2. | Symplastic movement of water occurs through interconnected protoplast |
3. | Xylem is responsible for uptake of water |
4. | Phloem is responsible for translocation of food |
What is the direction of movement of sugars in phloem?
1. Bi-directional
2. Non-multidirectional
3. Upward
4. Downward
Function of companion cells is:
1. | Loading of sucrose into sieve elements |
2. | Providing energy to sieve elements for active transport |
3. | Providing water to phloem |
4. | Loading of sucrose into sieve elements by passive transport |
Loading of phloem is related to:
1. Increase of sugar in phloem
2. Elongation of phloem cell
3. Separation of phloem parenchyma
4. Strengthening of phloem fiber