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Natural selection
- Individuals of a species show variation - some individuals will be better able to survive in the environement and produce more healthy offspring than others - natural selection.
- This is when the environment ( including climate and other organisms) selects which individuals pass on their genes to the next generation
Evolution
This is often asked in I/GCSE Biology
- Charles Darwin suggested that, if the environment changes, then natural selection will result in the characteristics of a species changing gradually from generation to generation - Evolution
Diagram:
Environment changes - Different variations help individuals to survive and produce more young (e.g. thicker fur/more fat) - Characteristics of species gradually change from generation to generation (e.g. all individuals have thicker fur/more fat)
- Recent studies of DNA show that organisms that have the most similar DNA are the most closely related. - Predicted by Darwins theory
Drafted by Catrina (Biology)