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1)Give reasons of the following
a) Occurrence of transpiration is demonstrated in closed environment.
b) we use the colbalt paper in expriements on transpiration
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a) At night they are closed. Hence more transpiration occurs during the day. During cloudy days, the stomata are partially closed and the transpiration is reduced. (b) Humidity of the atmosphere - When the air is humid; it can receive very less water vapour.
b)Rate of transpiration can be easily demonstrated by cobalt chloride paper test. Dry cobalt chloride paper that is blue in colour turns pink when it comes in contact with water. ... We can measure the rate of transpiration by using the time taken for the paper to change its colour from blue to pink.
Explanation:
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