A-LevelBiologyTransport in plants9700/12 · May/June 2016 · Q251 Mark

The diagram shows the results of an experiment on transpiration using two different leaves. Each leaf was left on a balance in daylight in a closed room and its mass recorded at 1 hour intervals. [Figure 25.1] Which conclusions could be correct? 1 The loss of mass is mainly due to evaporation of water. 2 Most stomata close in both leaves after 1 hour. 3 Leaf 1 has a larger surface area than leaf 2. 4 Leaf 1 has a thicker cuticle than leaf 2.

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A1, 2, 3 and 4

B1, 2 and 4 only

C2 and 3 only

D3 and 4 only

✓ Correct answer

B: 1, 2 and 4 only

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Topic: Transport in plants, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, May/June 2016 Paper 1 Variant 2, question 25.

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