ZIMSEC A-Level Biology
8.10.1Natural Selection
Natural Selection in ZIMSEC A-Level Biology: what the syllabus expects you to know, the learning objectives and how to practise.
Subtopic87 practice questions4 lessons
Learning objectives
What the syllabus expects you to be able to do.
- 8.10.1.1Explain, with examples, how mutations and the environment may affect phenotype.
- 8.10.1.2Explain, with examples, how environmental factors act as forces of natural selection.
- 8.10.1.3Explain how natural selection may bring about evolution.
Lessons
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Evolution and the formation of new species
40 min
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Gene mutations: types, effects and sickle cell anaemia
35 min
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Natural selection: stabilising, directional and disruptive
40 min
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Variation: genes, environment and the two types of variation
35 min
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Sample question
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