What is natural selection in biology?
In biology, natural selection refers to the mechanism by which better-adapted individuals leave more offspring over generations. It matters because the same idea reappears across many later topics, so building a clear mental picture of it early saves a lot of time.
How to approach it step by step
To work with natural selection confidently, identify variation, selection pressure, differential survival and inheritance. LetMeTeach draws this out live on screen while explaining it aloud, so you watch each part appear instead of decoding a static block of text. You can interrupt at any point and ask for the same idea again in simpler words, in another language, or with a different example.
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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