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प्रश्न
Describe an experiment to show that the plant loses water through its leaves.
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उत्तर
Experiment: To demonstrate that the plants lose water through its leaves.
- Take one small-sized, well-watered potted plant having a few branches. Place a polythene bag over its one branch as shown in A and tie it with a rubber band.
- Remove all the leaves from another branch (B) of the same plant, cover this too with a polythene bag and tie it with a rubber band.
- Place the plant in sunlight, and observe it after 4-6 hours. You will notice that drops have appeared on the inner surface of the polythene bag over branch A, while no water drops appear on branch B.
- This set-up indicates that most water gets evaporated from the plant through its leaves
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संबंधित प्रश्न
State whether the following statement is true or false. Rewrite the false statement correctly.
During transpiration, the leaves lose more water from their upper surface.
Transpiration pull will be maximum under which set of the following conditions?
(a) State whether the following statements are True Or False?
(b) Rewrite the false statements,in the correct form by changing either the first or the last word only .
Voltmeter is an instrument used for measuring the rate of transpiration in green plants.
Suppose you have a small rose plant growing in a pot. How would you demonstrate transpiration in it?
Given below is an apparatus which has setup to investigate a physiological process in plants. The setup was placed in bright sunlight. Answer the questions that follow:
Name the process being studies. Define the process.
Given below is an apparatus which has setup to investigate a physiological process in plants. The setup was placed in bright sunlight. Answer the questions that follow:
Draw a neat, labelled diagram of a stomatal apparatus.
The figure given below represents an experimental setup with a weighing machine to demonstrate a particular process in plants. The experimental setup was placed in bright sunlight. Study the diagram and answer the following questions.
When the weight of the test tubes A and B is taken before and after the experiment, what change is observed? Justify.
Give Reasons for the following:
Why do some herbaceous plants show wilting of leaves during mid-day which again recover in the evening?
Differentiate Between Transpiration and Guttation.
An outline sketch of a tree is shown in a diagram below. Study the same and answer the questions that follow:
- Name and define the phenomenon labelled A in the diagram.
- Write the significance of the process mentioned in A for the plants.
- What do the direction of the arrows in B and C indicate? Name the phenomena.
- Draw a neat and labelled diagram of an opened stomata.
