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Which option correctly contrasts the named ideas for Variation and evolution, Selective breeding: students must describe selective breeding as humans breeding plants and animals for particular genetic characteristics.
- A.Correct contrast: DNA can contain many genes; a gene has a specific coding role. This matches Selective breeding because students must describe selective breeding as humans breeding plants and animals for particular genetic characteristics.
- B.Reversed contrast: Calling a gene a whole chromosome. This would blur DNA vs genes instead of testing Selective breeding.
- C.Over-broad contrast: Explaining protein coding without naming the gene as the relevant section of DNA. This misses the objective focus on describe selective breeding as humans breeding plants and animals for particular genetic characteristics.
- D.Unrelated contrast: It moves into a neighbouring Unit 4.6 idea rather than Variation and evolution / Selective breeding.
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