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प्रश्न
Mark the most appropriate answer in the following:
In the mechanism of opening and closing of stomata, the important factor is
विकल्प
The presence of chloroplast in the guard cells
The turgid and flaccid state of the guard cells
The protein content of the cells
The starch content of the cells
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उत्तर
The turgid and flaccid state of the guard cells
APPEARS IN
संबंधित प्रश्न
Given ahead is a diagram of an experimental setup to study the process of transpiration in plants. Study the same and then answer the question that follows:
- Name the colour of dry cobalt chloride paper.
- Is the experimental leaf a monocot or a dicot? Give a reason to support your answer.
- Why are glass slides placed over the dry cobalt chloride papers?
- 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 ahead is the diagram of an experimental set up to study the process of transpiration in plants. Study the same and then answer the question that follow:
Why are glass slides placed over the dry cobalt chloride papers?
State the functions of guard cells.
Explain the Term
Stomatal transpiration
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:
The process of getting rid of excess water in the form of water vapour through the stomata.
Suppose you have a rose plant growing in a pot, how will you demonstrate transpiration in it?
Mention the differences between stomatal and lenticular transpiration.
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.
