- Living things show variation
- The recourses living things need are limited. Individuals must compete for these resources to survive - only some will survive
- some of the varieties of a particular species will have a better chance of survival . Those varieties will have an increased chance of breeding and passing on their genes
- This means that a greater proportion of individuals in the next generation will have better alleles, and therefore better characteristics, that will help them to survive
- Over many generations, the species becomes better and better adapted to survive. The best features are naturally 'selected' and the species becomes more and more adapted to its environment.
Base notes: CGP
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