AS Biology - Transpiration (OCR A Chapter 9.3)

Transpiration is the loss of water vapour by evaporation through the stomata on the leaves and the stem. It drives the transpiration pull, which is the flow of water and mineral ions from the roots up the xylem. There are a couple of factors that would affect the rate of transpiration, and the potometer is used to estimate the rate. In this video, we will go into more detail about what transpiration is, the pros and cons, the factors affecting the rate and more on the use of potometers.

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• #transpiration
• #xylem
• #stomata
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• #potometer