Explain natural selection with a simple example
The short version: natural selection refers to the mechanism by which better-adapted individuals leave more offspring over generations. A quick example makes it concrete — Peppered moths shifted in colour as tree bark darkened during industrialisation.
How to approach it step by step
Once one example makes sense, the method generalises: identify variation, selection pressure, differential survival and inheritance. In a visual interactive session the example is built on screen piece by piece, so you see which quantity changes at each step instead of only reading a final answer. Ask for a harder variant and the explanation adapts on the spot.
Worked example
Peppered moths shifted in colour as tree bark darkened during industrialisation.
The mistake most learners make
Saying individuals evolve, when it is populations that change.
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