Advertisements
Advertisements
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?
Advertisements
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
The loss of water as water vapour from the acrial parts of a plant is known as
Transpiration will be fastest when the day is
Most of the transpiration in tall trees occurs through
Give suitable explanation for the following:
More transpiration occurs from the lower surface of a dorsiventral leaf.
List any three major factors that accelerate the rate of transpiration.
There is a general belief that forests tend to bring more frequent rains. Can you explain it scientifically?
Mention any three methods by which the plants tend to reduce transpiration.
Explain how the rate of transpiration is affected on:
a windy day
How does the rate of Transpiration differ when there is High temperature?
