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उत्तर
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संबंधित प्रश्न
Choose the correct answer:
Stomata open during day time because guard cells
Where are stomata generally found?
State the functions of guard cells.
Give Reasons for the following:
Guard cells are small in size and are kidney-shaped in outline.
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?
State the Location:
Stomata
Suppose you have a rose plant growing in a pot, how will you demonstrate transpiration in it?
Give a reason/suitable explanation.
More transpiration occurs from the under surface of a dicot leaf.
The given figure represents an experiment:
- Leaf A was coated with grease on both surfaces.
- Leaf B was coated with grease on the lower surface.
- Leaf C was coated with grease on the upper surface.
- Leaf D was left without any application of grease. All four leaves A, B, C and D were left in a room for about 24 hours.
- Which leaf dries first? Give reason.
- Which leaf dries last? Give reason.
