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Question
The paper used to demonstrate unequal transpiration in a dicot leaf is ______.
Options
Filterpaper
Litmus paper
Starch paper
Cobalt chloride paper
Solution
The paper used to demonstrate unequal transpiration in a dicot leaf is Cobalt chloride paper.
Explanation:
One can use dry Cobalt chloride paper to illustrate transpiration. When this is placed on a transpiring leaf, it changes colour from blue to pink.
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RELATED QUESTIONS
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 ______
Choose the correct answer:
Stomata open during day time because guard cells
Differentiate Between Cobalt chloride paper and Goat’s bladder.
The figure below represents the vertical section of a leaf:
(i) Name the parts labeled 1 to 5.
(ii) What do the two arrows (dotted and solid) indicate in the day time and at night?
(iii) Could you add one more arrow in the figure? If yes, what for?
(iv) How many leaf veins have been shown in this section?
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?
Choose the Odd One Out
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 three kinds of transpiration.
Give a reason/suitable explanation.
More transpiration occurs from the under surface of a dicot leaf.
