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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
With decrease in atmospheric pressure, the rate of transpiration will
One of the internal factors which affect the rate of transpiration is
The loss of water as water vapour from the acrial parts of a plant is known as
Transpiration is best defined as
Give suitable explanation for the following:
A higher rate of transpiration is recorded on a windy day rather than on a calm day.
Mention any three methods by which the plants tend to reduce transpiration.
Answer the following (only in few words);
How does transpiration take place in night?
Explain how the rate of transpiration is affected on:
a windy day
Choose the correct answer:
Rate of transpiration is more, when __________
Name the following:
Season in which the transpiration rate is the highest.
