LABORATORY REVIEW
TRANSPIRATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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time
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height of tomato plants
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amount of fertilizer
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rate of transpiration
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Detailed explanation-1: -Factors Affecting the Rate of Transpiration In the previous section, we learnt that the rate of transpiration is affected by light intensity, temperature, air movement (wind) and humidity. We can use a potometer to investigate how these factors affect the rate of transpiration.
Detailed explanation-2: -The rate of transpiration can be calculated by measuring the distance travelled by an air bubble in a capillary tube over a given time. The faster the bubble moves, the greater the rate of water uptake – and so the greater the assumed rate of transpiration.
Detailed explanation-3: -OBSERVATIONS: Water drops appear inside the walls of the bell jar containing potted plant whereas no water drops appear in the bell jar without a plant. This demonstrates that water is evaporated from the surface of leaves in presence of sunlight.