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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
उत्तर
The turgid and flaccid state of the guard cells
APPEARS IN
संबंधित प्रश्न
Given below is an example of a certain structure and its special functional activity:
Chloroplasts and Photosynthesis
In a similar way, write the functional activity against the following:
Lenticels and ______
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?
Give Reasons for the following:
Guard cells are small in size and are kidney-shaped in outline.
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.
(iii) Why axe glass slides placed over the dry cobalt chloride papers?
(iv) 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.
(v) Define the term ‘transpiration’.
Draw a neat diagram of the stomatal apparatus found in the epidermis of leaves and label the Stoma, Guard cells, Chloroplast, Epidermal Cells, cell wall and Nucleus.
Write the functional activity of the following structure:
Stomata
Define the following term:
Cuticle
Give a reason/suitable explanation.
Leaves of some plants wilt during midday and recover in the evening.
