A-LevelBiologyTransport in plants9700/12 · May/June 2021 · Q241 Mark

The diameter of a tree trunk usually decreases slightly during the day. Which changes in environmental factors during the day could cause the diameter to decrease even more? [Figure 24.1]

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Aincreased humidity and increased light intensity

Bincreased wind speed, increased humidity and increased light intensity

Cincreased wind speed and increased humidity

Dincreased wind speed and increased light intensity

✓ Correct answer

B: increased wind speed, increased humidity and increased light intensity

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Topic: Transport in plants, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, May/June 2021 Paper 1 Variant 2, question 24.

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