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प्रश्न
The rate of transpiration is determined with a/an ______.
विकल्प
potometer
evaporimeter
atmometer
perimeter
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उत्तर
The rate of transpiration is determined with a/an potometer.
Explanation:
A potometer (such as Ganong’s potometer) is a specialised laboratory instrument used to measure the rate of water uptake by a leafy shoot, which is directly proportional to the rate of transpiration. It functions by tracking the movement of a tiny air bubble along a graduated capillary tube as the plant transpires and draws water. In contrast, evaporimeters and atmometers measure overall evaporation from open surfaces, while a perimeter is used in ophthalmology to test visual fields.
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संबंधित प्रश्न
The rate of transpiration is more when
List any three major factors that accelerate the rate of transpiration.
Mention any three methods by which the plants tend to reduce transpiration.
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?
Explain how the rate of transpiration is affected on:
a foggy day
Choose the correct answer:
Transpiration rate is high, when ___________
Briefly explain how the rate of transpiration is affected by:
The intensity of light.
How does the rate of Transpiration differ when there is High temperature?
Give a reason/suitable explanation.
Transpiration increases with the velocity of the wind.
