Advertisements
Advertisements
प्रश्न
How does transpiration help in the uptake of water from the soil?
Advertisements
उत्तर १
Transpiration is the loss of water in vapour form from the leaves into the air. As water is used up or lost from the leaves, more is sucked up from the xylem vessels. It’s like sucking water up a straw. So there is a continuous flow of water from the roots to the leaves. This movement of water up the xylem is called the transpiration stream.
उत्तर २
As water evaporates, a suction force is created, which draws water up through the stem.
Notes
Students should refer to the answers according to their questions.
APPEARS IN
संबंधित प्रश्न
The set up shown alongside was kept in sunlight for an hour. It was observed that drops of water appeared on the inside of the polyethylene bag.
- Name the process which is being demonstrated.
- Why was the pot and its soil left uncovered by the polythene bag?
- Why was the pot left in the sunlight?
- Suppose the pot in this experiment was placed inside a dark room instead of placing it in sunlight for some time. What difference will be noticed?
State whether the following statement is true or false. Rewrite the false statement correctly.
Transpiration is the loss of water from the roots of the plant.
State whether the following statement is true or false. Rewrite the false statement correctly.
Transpiration cools the plant when it is hot outside.
Name the process by which water loss takes place through the leaves.
(a) State whether the following statement are True or False.
(b) Rewrite the false statement in the correct form by changing either the first or the last word only.
Most transpiration occurs at midnight.
Distinguish between the following :
Cuticular transpiration and lenticular transpiration
Choose the correct answer:
More water loss in plants is the cause of wilting. This can be checked by ____________
Describe an experiment to prove that transpiration occurs more from the undersurface of dorsiventral leaves.
Transpiration takes place through ______.
Plants show temporary and permanent wilting. Differentiate between the two. Do any of them indicate the water status of the soil?
