GCSE Biology Evolution Revision Notes
Master GCSE Biology Evolution using simple revision notes, key facts and practice questions — all generated by AI for your exam.
Evolution is the process by which species change over time through natural selection and genetic variation. It explains how all living organisms are related and how they adapt to their environments.
Key Concepts
- 1Natural selection is the mechanism of evolution.
- 2Variation within a species is essential for evolution.
- 3Adaptations help organisms survive in their environments.
- 4Fossil evidence supports the theory of evolution.
- 5Species can diverge from common ancestors over time.
Simple Explanation
Evolution is how living things change and adapt over long periods. It happens because some individuals have traits that help them survive better than others. These traits can be passed on to their offspring, leading to changes in the species. Over time, this can result in new species forming.
Memory Trick
“Remember 'V.A.N.S.' for Variation, Adaptation, Natural selection, Survival of the fittest.”
Flashcards
What is natural selection?
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Exam Questions
Describe and explain the process of natural selection. [6 marks]
6 marksView mark scheme hint▾
Mention variation, competition, survival, reproduction, and passing on traits.
Explain how adaptations can lead to evolution. [4 marks]
4 marksView mark scheme hint▾
Discuss how adaptations improve survival and reproduction.
What is meant by the term 'evolution'? [2 marks]
2 marksView mark scheme hint▾
Define evolution and mention change over time.
Practice Quiz
What is the main mechanism of evolution?
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