A) nanometer
B) auxanometer
C) pofometer
D) barometer
Correct Answer: C
Solution :
Transpiration is the loss of water from aerial parts of plant in form of vapour. It takes place mainly through stomata. Ganongs potometer is commonly used for the measurement of transpiration sometimes farmers potometer is also used. The growth can be measured in terms of fresh weight, dry weight, length and area. Pfeffers auxanometer is used to measure the growth in length of plant.
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