A potometer was used to compare the rate of loss of the same volume of water from a plant under different environmental conditions as under a fan, at the sea shore, under the sun, in the airy laboratory and in cupboard. What time was likely to have been obtained in a cupboard?
15 secs
30secs
25secs
20secs
28secs
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In the cupboard, transpiration or water loss is longer because it is enclosed and not exposed to certain factors that enable transpiration like wind
As we can see in the question we were given about five places the plant was tested for transpiration and in the options we were given five options too .
The latest time which is 30 secs takes place in the cupboard. When we talk about factors affecting transpiration ,it includes temperature,light intensity etc . In this case the light intensity can be considered as sunlight or any light that at least produces heat .
In the cupboard ,we see that there is absense of light ,low temperature etc ,which makes the transpiration slow compared to the one under a sun ( light or temperature) at the seashore (wind) as well as under a fan ( in a wind form ).
I hope we understand ;)
My noble learned chaps let me help. The following factors affect transpiration: size of leaves, number of leaves, number of stomata, wind, light supply, relative humidity, temperature, presence of cuticles, water supply to the plant. All this factors are directly proportional to transpiration except relative humidity and number of cuticles.
Transpiration is slow in an enclosed system so that in the cupboard will take longer
Yeh transpiration will take a longer time becos d plant is being preventd from factors that increases transpiration
Potometer measures the rate of loss of water by plan (via transpiration).
The rate of transpiration increses with conditions like:
- wind
- humidity
- temperature, etc.
When a plant is placed in cupboard the rate of transpiration is reduced, hence 30secs is most correct option.
Transpiration occurs when ÷
• the stomata is turgid
• there is low humidity
• temperature is increasing
• light intensity is high
• wind rate is high.
So therefore, transpiration takes time in a cupboard.
one is that there is no sunshine or sunlight so evaporation cannot be taken place even if it is a plant that need to grow it will take a lot lot more than the ones outside the cup board
a potometer was used to compare the rate of loss of the same volume of water from a plant under different environmental conditions as under a fan, at the sea shore, under the sun, in the airy laboratory and in cupboard. What time was likely to have been obtained in a cupboard?
