Biologycalendar_todayLast updated: Apr 2026
What is Natural Selection?
/ˌnætʃərəl sɪˈlɛkʃən/
Natural selection is the process by which organisms with traits better suited to their environment survive, reproduce, and pass those traits to offspring, gradually shifting the characteristics of a species over generations.
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Everyday Example
If a population of beetles lives on dark soil, dark-coloured beetles are less visible to predators. Over generations, the population shifts toward darker colouring — natural selection at work.
publicReal-World Application
“Antibiotic resistance is natural selection in fast-forward: bacteria with mutations that resist a drug survive treatment, multiply, and pass on resistance — evolving in days rather than millennia.”
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Did you know?
Charles Darwin observed natural selection during his voyage on HMS Beagle (1831-1836), publishing "On the Origin of Species" in 1859 — one of the most influential books in history.
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Key Insight
Natural selection is not random — it has direction (toward better survival and reproduction) but no foresight. It cannot plan ahead, which is why evolution finds clever but often imperfect solutions.
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