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Evolution by natural selection

Evolution by natural selection

Evolution is the gradual change in the inherited characteristics of a population over many generations. Natural selection is a mechanism that can cause this change by altering the frequencies of alleles in a population.

4.1 Evolution and natural selection Lesson

  1. GCSE
  2. /Biology
  3. /4.1 Evolution and natural selection

Step-by-step lessons on Edexcel GCSE Biology 4.1 Evolution and natural selection, covering 4.1.1 Work of Darwin and Wallace and 4.1.2 Resistant organisms and evolution. Each one builds up to exam-style questions. Start with the foundational topics and build up to the higher-tier material.

Lessons