O-LevelBiologyGenetics & Variation5090/11 · Oct/Nov 2025 · Q311 Mark

Which row shows possible effects of natural selection?

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Anatural selection can cause mutations to occur: no, natural selection can lead to the extinction of a species: no

Bnatural selection can cause mutations to occur: no, natural selection can lead to the extinction of a species: yes

Cnatural selection can cause mutations to occur: yes, natural selection can lead to the extinction of a species: no

Dnatural selection can cause mutations to occur: yes, natural selection can lead to the extinction of a species: yes

✓ Correct answer

B: natural selection can cause mutations to occur: no, natural selection can lead to the extinction of a species: yes

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Topic: Genetics & Variation, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, Oct/Nov 2025 Paper 1 Variant 1, question 31.

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