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प्रश्न
State the functions of guard cells.
उत्तर
Guard cells regulate the opening and closing of stomata thus, control gas exchange and transpiration.
APPEARS IN
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 is the purpose of using a manometer?
Differentiate Between Stomata and Hydathodes.
The apparatus shown here is Girreau’s poto-meter 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 a few hours, CaCl2 vials were taken out and weighed again.
(i) What is the purpose of keeping CaCl2 vials inside the cup?
(ii) After a few hours, the CaCl2 vials were taken out and weighed again. Will you expect any difference in weight? If so, give reasons.
(iii) What was the purpose of using a mano-meter?
(iv) What do you mean by transpiration?
Name the following:
A plant having sunken stomata.
Complete the following sentence with appropriate word:
95% of the total transpiration takes place through ________.
State the Location:
Guard cells
Choose the Odd One Out
How will you differentiate the different types of transpiration?
Give a reason/suitable explanation.
Leaves of some plants wilt during midday and recover in the evening.
