Advertisements
Advertisements
Question
Plants show temporary and permanent wilting. Differentiate between the two. Do any of them indicate the water status of the soil?
Advertisements
Solution
| Temporary Wilting | Permanent Wilting |
| (i) There is a temporary loss of turgidity in cells. | (i) There is permanent loss of turgidity in cells. |
| (ii) This happens when the rate of | (ii) This happens when the rate of transpiration is more than the rate of water supply Then the rate of water supply. But the difference is below a critical level. |
| (iii) Wilting disappears as soon as the water supply resumes to normal. | (iii) Wilting does not disappear even after the water supply resumes to normal. |
| (iv) Plant recovers its normal activity. | (iv) Plant eventually dies. |
APPEARS IN
RELATED QUESTIONS
Differentiate between Transpiration and Evaporation
Water reaches great heights in the trees because of suction pull caused by ______.
The loss of water in the form of water vapour through stomata on leaves is known as ___________.
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?
Define the term Transpiration stream
Name the process by which water loss takes place through the leaves.
Differentiate between osmosis and transpiration.
Transpiration is the loss of water as water ______ from the ______ parts of the plant.
Given alongside is the diagram of an experimental set-up to demonstrate a certain phenomenon in plants.
Name the phenomenon being demonstrated.

Given alongside is the diagram of an experimental set-up to demonstrate a certain phenomenon in plants.

What is the purpose of putting oil in the test tube?
Define the term:
Guttation
Explain the term:
Transpiration
Stomata of a plant open due to ______.
______ involves evaporative loss of water from aerial parts.
What causes the opening and closing of guard cells of stomata during transpiration?
Describe briefly the three physical properties of water which helps in ascent of water in xylem.
ABA (Abscisic acid) is called a stress hormone. How does this hormone overcome stress conditions?
Observe the diagram and answer the following;
![]() (i) |
![]() (ii) |
- Are these types of guard cells found in monocots or dicots?
- Which of these shows a higher water content (i) or (ii)?
- Which element plays an important role in the opening and closing of stomata?
Briefly describe the following:
Angina Pectoris
(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.
Transpiration helps to cool the body of the plant.


