A student measures the distance travelled by a potometer bubble in four trials, each lasting 5 minutes.
The distances are 18 mm, 19 mm, 43 mm and 20 mm. A leak was found during the trial giving 43 mm, so this result is excluded.
The capillary tube has a cross-sectional area of 0.20 mm2.
What is the mean rate of water uptake from the remaining results?
3.80 mm3/min3.80\ \text{mm}^3/\text{min}3.80 mm3/min
0.76 mm3/min0.76\ \text{mm}^3/\text{min}0.76 mm3/min
1.00 mm3/min1.00\ \text{mm}^3/\text{min}1.00 mm3/min
2.28 mm3/min2.28\ \text{mm}^3/\text{min}2.28 mm3/min
43 exam-style questions on Edexcel GCSE Biology 6.2 Transport in plants, covering 6.2.1 Root hair cell adaptations, 6.2.2 Structure of xylem and phloem, 6.2.3 Transpiration and stomata, 6.2.4 Translocation of sucrose, 6.2.5 Leaf structure for photosynthesis, 6.2.6 Environmental factors on water uptake, 6.2.7 Rate calculations for transpiration, and 6.2.8 Plant adaptations to extreme environments. Each one has a worked solution and a mark scheme showing where the marks go.