A-LevelBiologyTransport in plants9700/12 · May/June 2021 · Q251 Mark
A student wanted to find out the rate of transpiration using a potometer as shown. [Figure 25.1] The student was told to work out a value for transpiration using the units mm³, m⁻² and hour⁻¹. Which measurements would the student need to take?
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Avolume of water in the reservoir, length of the capillary tubing, temperature and how many leaves are on the shoot
Bvolume of water in the reservoir, radius of the capillary tubing, time and surface area of the leaves
Cdistance air bubble moves, radius of the capillary tubing, time and surface area of the leaves
Ddistance air bubble moves, length of the capillary tubing, temperature and how many leaves are on the shoot
✓ Correct answer
C: distance air bubble moves, radius of the capillary tubing, time and surface area of the leaves
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