Advertisements
Advertisements
Question
Water moves up against gravity and even for a tree of 20m height, the tip receives water within two hours. The most important physiological phenomenon which is responsible for the upward movement of water is ______.
Advertisements
Solution
Water moves up against gravity and even for a tree of 20m height, the tip receives water within two hours. The most important physiological phenomenon which is responsible for the upward movement of water is transpiration pull.
APPEARS IN
RELATED QUESTIONS
Differentiate between guttation and transpiration.
What role does root pressure play in water movement in plants?
Describe transpiration pull model of water transport in plants. What are the factors influencing transpiration? How is it useful to plants?
The theory that suggests "water moves in a continuous column through stem and leaves" is known as
Root pressure is maximum, when :-
Match List - I with List - II.
| List - I | List - II | ||
| (a) | Cohesion | (i) | More attraction in the liquid phase |
| (b) | Adhesion | (ii) | Mutual attraction among water molecules |
| (c) | Surface tension | (iii) | Water loss in the liquid phase |
| (d) | Guttation | (iv) | Attraction toward polar surfaces |
Choose the correct answer from the options given below.
Which one of the following will not directly affect transpiration?
The process of guttation takes place ______.
From your knowledge of physiology can you think of some method of increasing the life of cut plants in a vase?
Salt is applied to tennis lawns to kill weeds. How does salting tennis lawns help in killing of weeds without affecting the grass?
We know that plants are harmed by excess water. But plants survive under flooded condition. How are they able to manage excess water?
