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Question
The rate of transpiration is more when
Options
atmosphere is dry
temperature is high
humidity is high
atmosphere is dry and temperature is high
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Solution
atmosphere is dry and temperature is high
Explanation:
When the atmosphere is dry, there is low humidity, creating a large difference in water vapour concentration between the inside of the leaf and the surrounding air.
High temperatures increase the kinetic energy of water molecules inside the leaf, speeding up evaporation.
Dry atmospheric conditions and high temperatures maximize transpiration by promoting faster evapouration within the leaf and enhancing water vapour diffusion into the surrounding air.
RELATED QUESTIONS
One of the internal factors which affect the rate of transpiration is
(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.
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?
Expand the following biological abbreviations :
IAA
Answer the following (only in few words);
What is the effect of temperature on transpiration?
Briefly explain how the rate of transpiration is affected by:
The humidity of the atmosphere.
Describe any three conditions which affect transpiration.
