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Question
Given below is an apparatus used to study a particular process in plants. Study the same and answer the questions that follow :
(i) Name the apparatus.
(ii) Mention one limitation of this apparatus.
(iii) Which phenomenon is studied with the help of this apparatus?
(iv) What is the function of the part marked ‘reservoir’?
(v) What is the role of the air bubble in the experiment?
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Solution
(i) Garreau’s Potometer.
(ii) The capillary tube should be properly dipped into the water.
(iii) Transpiration.
(iv) It is used to adjust the position of air bubble in graduated capillary tube.
(v) The movement of air bubble in graduated tube in a minute gives the rate of transpiration.
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After about half an hour what change, if any, would you expect to find in the cobalt chloride paper placed on the dorsal and ventral sides of the leaf? Give a reason to support your answer.
Given below is the diagram of an experimental set up to study the process of transpiration in plants. Study the same and then answer the questions that follow:
(i) What is the colour of dry cobalt chloride paper?
(ii) Is the experimental leaf a monocot or a dicot? Give a reason to support your answer.
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Give Technical Term
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Stomata open during day and close at night because:
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The paper used to demonstrate unequal transpiration in a dicot leaf is ______.
The given figure represents an experiment:
- Leaf A was coated with grease on both surfaces.
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