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Variation provides the raw material

Variation provides the raw material

A population is all the organisms of one species living in the same area at the same time. Genetic variation means differences in DNA sequences between individuals, including differences in the alleles they carry.

5.2 Natural selection and evolution Lesson

  1. GCSE
  2. /Biology
  3. /5.2 Natural selection and evolution

Step-by-step lessons on OCR GCSE Biology 5.2 Natural selection and evolution, covering 5.2.1 Genetic variation within a population, 5.2.2 Developments in classification systems, 5.2.3 How evolution occurs through natural selection, 5.2.4 Evolution as change over time, 5.2.5 Evidence for evolution, and 5.2.6 Darwin and Wallace. Each one builds up to exam-style questions. Start with the foundational topics and build up to the higher-tier material.

Lessons