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प्रश्न
Given below is an experimental set up to study a particular process:
(i) Name the process being studied.
(ii) Explain the process named in (i) above.
(iii) Why is the pot covered with a plastic sheet?
(iv) Mention one way in which this process is beneficial to the plant.
(v) Suggest a suitable control for this experiment.
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उत्तर
(i) Transpiration.
(ii) It is processed in which water in the form of vapours are released from the aerial parts like leaves and soft stems of the plant.
(iii) The plastic sheet will not allow the moisture of the mud of the pot to come out and affect the result.
(iv) It helps in the ascent of sap in the plant.
(v) A similar apparatus is set up without the potted plant. In its place, the same plastic bag, with its mouth tied, is kept in the bell jar. No water drops will appear in the bell jar.
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संबंधित प्रश्न
The apparatus shown in the following diagram is Garreau’s potometer designed to demonstrate unequal transpiration from the two surfaces of a dorsiventral leaf. Before keeping the leaf in between the cups, anhydrous calcium chloride (CaCl2) contained in two small vials were weighed and placed in both the cups. The ends of the cups were closed with corks through which two mercury manometers were connected. After few hours, CaCl2 vials were taken out and weighed again.
What do you mean by transpiration?
What is the advantage of wilting to a plant?
The figure below represents the vertical section of a leaf:
(i) Name the parts labeled 1 to 5.
(ii) What do the two arrows (dotted and solid) indicate in the day time and at night?
(iii) Could you add one more arrow in the figure? If yes, what for?
(iv) How many leaf veins have been shown in this section?
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?
Name the following:
A plant having sunken stomata.
Complete the following sentence with appropriate word:
Openings found on the undersurface of the dorsiventral leaf are ___________.
State the Location:
Stomata
State the Location:
Guard cells
Mark the most appropriate answer in the following:
Stomata open during day and close at night because:
The paper used to demonstrate unequal transpiration in a dicot leaf is ______.
