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Natural Selection and Evolution Evidence — OCR GCSE Combined Science B J260
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Combined Science
OCR GCSE Combined Science B
Evolution and Biodiversity
Development of Evolutionary Theory
Natural Selection and Evolution Evidence
OCR GCSE Combined Science B · J260
Natural Selection and Evolution Evidence
What you need to know
State the existence of extensive genetic variation within most species populations.
Recall that genetic variants stem from mutations, noting that most do not affect the phenotype, some influence it, and a rare few determine it.
Explain the process of evolution through the natural selection of variants that yield phenotypes better adapted to their environments.
Explain the crucial role of competition within a community in driving natural selection.
Describe evolution as a cumulative change in inherited characteristics over multiple generations, potentially culminating in speciation.
Explain the significant impacts of selectively breeding food plants and domesticated animals.
Describe the role of the fossil record in providing concrete evidence for evolutionary processes.
Describe contemporary evidence for evolution, highlighting examples such as antibiotic resistance in bacteria.
Revision notes
1
Genetic Variation, Natural Selection and Selective Breeding
10 key terms
2
Evidence for Evolution
7 key terms
Practise with past papers
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