UNIT OVERVIEW

This revision covers two connected topics: Evolution by Natural Selection and Human Evolution. These ideas explain how living things change over time and how humans fit into the story of life on Earth.

What you will revise:

• Darwin's theory of natural selection and how it differs from other ideas about evolution
• Evidence for evolution (fossils, genetics, biogeography)
• How new species form (speciation)
• Modern examples of evolution (antibiotic resistance, pesticide resistance)
• Fossil and genetic evidence for human evolution
• Key hominin species and their features
• South African fossil sites and scientists
• Alternative explanations for the origin of life

What you should already know:

• Grade 10: Fossils, biogeography, biodiversity
• Grade 11: Biodiversity and classification
• Grade 12 Term 1: DNA structure, meiosis, genetic variation

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