O-LevelBiologyPlant Nutrition5090/11 · Oct/Nov 2015 · Q61 Mark

Which features of the mesophyll layer in a leaf aid rapid diffusion of carbon dioxide into the cells?

Aair spaces aids diffusion, layer of moisture on the outside of the cell walls aids diffusion

Bair spaces aids diffusion, layer of moisture on the outside of the cell walls does not aid diffusion

Cair spaces does not aid diffusion, layer of moisture on the outside of the cell walls aids diffusion

Dair spaces does not aid diffusion, layer of moisture on the outside of the cell walls does not aid diffusion

✓ Correct answer

A: air spaces aids diffusion, layer of moisture on the outside of the cell walls aids diffusion

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Topic: Plant Nutrition, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, Oct/Nov 2015 Paper 1 Variant 1, question 6.

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