O-LevelBiologyGenetics & Variation5090/12 · Oct/Nov 2022 · Q391 Mark

Rising carbon dioxide levels in the atmosphere are causing the Earth’s climate to warm up. In what way might this change of climate affect the process of natural selection?

Asmall rise in temperature may reduce the rate of photosynthesis in plants.

BFarmers may try to grow different crops in the warmer areas.

CIt may allow some animals and plants to colonise new areas.

DSome mutations may prove to be an advantage in warmer conditions.

✓ Correct answer

D: Some mutations may prove to be an advantage in warmer conditions.

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Topic: Genetics & Variation, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, Oct/Nov 2022 Paper 1 Variant 2, question 39.

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