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Question
How do stomata differ from a lenticel?
Solution
Stomata present, on the leaf and open only during the day while lenticel present on the stem of woody plants and open at all times.
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RELATED QUESTIONS
Choose the correct answer:
Stomata open during day time because guard cells
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?
Where are stomata generally found?
State the functions of guard cells.
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?
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.
Complete the following sentence with appropriate word:
95% of the total transpiration takes place through ________.
Name the following:
The openings on the barks of trees through which transpiration occurs.
