A-LevelBiologyTransport in plantsMay/June 2021Paper 1 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?
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
The correct answer is C. This question tests the candidate's understanding of transport in plants within the Biologysyllabus. The examiner's mark scheme requires...
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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