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Which option gives the correct cause-and-effect relationship for Variation and evolution, Evolution: students must explain that selected individuals are more likely to survive, breed and pass on characteristics.
- A.Correct cause and effect: DNA is the molecule; a gene is a functional section of that molecule. This matches Evolution because students must explain that selected individuals are more likely to survive, breed and pass on characteristics.
- B.Reversed cause: Treating DNA as if it always means one gene. This would blur DNA vs genes instead of testing Evolution.
- C.Missing link: Calling a gene a whole chromosome. This misses the objective focus on explain that selected individuals are more likely to survive, breed and pass on characteristics.
- D.Different process: It moves into a neighbouring Unit 4.6 idea rather than Variation and evolution / Evolution.
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