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प्रश्न
In an experiment, four freshly plucked leaves (A-D) of a plant, such as those of china – rose, were treated as follows:
(a) Coated with Vaseline on its upper surface.
(b) coated on the lower surface.
(c) coated on both surface
(d) left uncoated.
All the four leaves A, B, C & D were left in a room for about 24 hours.
(i) which leaf would become most limp? Why?
(ii) which leaf would show least limping? Why?
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उत्तर
(i) The leaf D would become most limp. This is because water would be lost through transpiration from upper as well as the lower surface of leaf D since it is uncoated.
(ii) The least limping would be shown by leaf C since its upper and lower surfaces have been coated with vaseline. So no water is lost from the leaf through transpiration since the stomatal openings get blocked by vaseline.
संबंधित प्रश्न
(a) State whether the following statement are True (T) or False (F)
(b) Rewrite the false statement in (a) above in the correct form by changing either the first or the last word only.
Wind velocity has an effect on transpiration.
Give suitable explanation for the following:
A higher rate of transpiration is recorded on a windy day rather than on a calm day.
List the four advantages of transpiration to the plants.
Choose the correct answer from the four options given below :
Which one of the following does not affect the rate of transpiration ?
Answer the following (only in few words);
How does transpiration take place in night?
Answer the following (only in few words);
What is the relationship between transpiration water and water absorbed from the soil?
Choose the correct answer:
The rate of transpiration is determined with the following instrument ____________
What is cohesion?
How does the rate of Transpiration differ when there is High humidity?
Name the three external factors which increase the rate of transpiration.
