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O-LevelBiologyPlant Nutrition5090/12 · Oct/Nov 2014 · Q61 Mark

When a plant is photosynthesising, which gases enter and leave the stomata?

Acarbon dioxide enters, oxygen leaves, water vapour enters
Bcarbon dioxide enters, oxygen leaves, water vapour leaves
Ccarbon dioxide leaves, oxygen enters, water vapour enters
Dcarbon dioxide leaves, oxygen enters, water vapour leaves

✓ Correct answer

B: carbon dioxide enters, oxygen leaves, water vapour leaves

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About this question

Topic
Plant Nutrition, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source
O-Level Biology, Oct/Nov 2014 Paper 1 Variant 2, question 6.

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