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प्रश्न
Give Reasons for the following:
Guard cells are small in size and are kidney-shaped in outline.
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उत्तर
Because of their small size, guard cells are rapidly influenced by turgor changes. Because of their kidney-shaped outline, they remain joined at their ends. This concave-convex curvature of the two guard cells can be varied easily and this further facilitates the stomatal pore to open and close easily.
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संबंधित प्रश्न
Name the following:
openings on the stem through which transpiration occurs.
Distinguish between the following:
Stomata and lenticels
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?
Name the following:
The process of getting rid of excess water in the form of water vapour through the stomata.
Complete the following sentence with appropriate word:
95% of the total transpiration takes place through ________.
Complete the following sentence with appropriate word:
In Nerium, the stomata are present in _________.
Mark the most appropriate answer in the following:
In the mechanism of opening and closing of stomata, the important factor is
Assertion (A): The loss of excess water from the aerial parts of the plant in the form of water vapor is known as transpiration.
Reason (R): Stomata of the leaf perform transpiration.
Name the following:
The openings on the barks of trees through which transpiration occurs.
Name the three kinds of transpiration.
