O-LevelBiologyPlant Nutrition5090/12 · Oct/Nov 2018 · Q71 Mark
The diagram represents a cross-section of part of a leaf. [Figure 7.1] How does the oxygen content of the air at X compare to normal atmospheric air when the leaf is in the light and when it is in the dark?
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
Ain the light: higher, in the dark: lower
Bin the light: higher, in the dark: the same
Cin the light: lower, in the dark: higher
Din the light: lower, in the dark: the same
✓ Correct answer
A: in the light: higher, in the dark: lower
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