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Question
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Solution
Experiment to show that during transpiration , evaporation of water takes place in vapour form :
- Take a well watered potted plant .
- Cover the potted plant in a polythene sheet.
- Keep the potted plant in the sunlight.
- Droplets of water are seen on the inner side of the polythene . This shows that the water evaporates and condenses to form droplets of water .
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RELATED QUESTIONS
Transpiration pull will be maximum under which set of the following conditions?
Which of the following statements are true and which ones are false? Give reason in support of your answer.
Most transpiration occurs during midday.
Briefly explain how the rate of transpiration is affected by
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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.
Choose the correct answer:
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Explain the Term :
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The figure given below represents an experimental setup with a weighing machine to demonstrate a particular process in plants. The experimental set-up was placed in bright sunlight. Study the diagram and answer the following questions:
- Name the process intended for the study.
- Define the above mentioned process.
- When the weight of the test tubes (A and B) is taken before and after the experiment, what is observed? Give reasons to justify your observations in A & B.
- What is the purpose of keeping the test tube B in the experimental set-up?
- What is the purpose of putting oil in the test tube?
The following diagram is set up to demonstrate an experiment.
Five plants A, B, C, D, and E were placed in a beaker containing water. The water in each beaker was covered with a layer of oil. The leaves were removed from plant D in plant B, upper surfaces of all the leaves were covered with Vaseline, in-plant C the lower surfaces of all the leaves were covered with Vaseline and plant E was exposed to strong light. The beakers were then left for a few hours and at the end of the experimental period, weights of each beaker were taken.
Write the correct answer out of the five available choices given under each question:
I. In which beaker would you expect the greatest decrease in weight?
(i) A (ii) B (iii) C (iv) D (v) E
II. In which beaker the change of weight would be minimum?
(i) A (ii) B (iii) C (iv) D (v) E
III. Which plant would remain healthy for a longer period of time?
(i) A (ii) B (iii) C (iv) D (v) E
IV. In this experiment which plant can be considered as the uncontrolled one?
(I) A (ii) B (iii) C (iv) D (v) E
V. The difference of weight would b maximum between:
(i) A and B (ii) A and C (iii) A and D (iv) A and E (v) D and E
