Biology
Answer
Differences between xylem and phloem are:
| Xylem | Phloem |
|---|---|
| Conducts water and mineral salts from the roots to the aerial parts of the plant. | Translocates food from the leaves to the storage organs and growing parts of the plant. |
| Made up of tracheids, vessels, xylem parenchyma and xylem fibres. | Made up of sieve tubes, companion cells, phloem parenchyma and phloem fibres. |
| Conducting cells (vessels and tracheids) are dead. | Conducting cells (sieve tubes) are living. |
| Conduction is unidirectional. | Conduction is bidirectional. |
| Conduction does not require any expenditure of energy. | Conduction requires expenditure of energy. |
Related Questions
The set up shown alongside was kept in sunlight for an hour. It was observed that drops of water appeared on the inside surface of the polythene bag.
(a) Name the process which is being demonstrated.
(b) Why was the pot with its soil left uncovered by the polythene bag?
(c) Why was the pot left in sunlight?
(d) Suppose that the pot in this experiment was placed inside a dark room instead of placing it in sunlight for some time. What difference would be noticed?
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How does temperature, light intensity and wind affect transpiration?
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(d) Part that is semi-permeable