Mutations are - rare random changes in genes or chromosomes, Most mutations are - harmless, Mutations can bring about - variation in organisms, Individuals of a species show - variation, Changes in the environment mean - some individuals are better suited , Animals better suited to their environment - are more likely to survive, Animals that survive can - breed more, Animals that survive and breed - pass on their advantageous genes, Over many generations - a species can adapt to their environment, An individual cannot - adapt, Natural selection can lead to  - evolution, Evolution takes over - many generations and a very long time,

1 Inheritance and Variation Part 5 Mutations and Natural Selection

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