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A LITTLE SOMETHING WORTH KNOWING

A small discovery. Yours to pass on.

ScienceOne small ahaBiology concept

The death of a species' last member completes this process.

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Your new ahaExtinction

Extinction: Complete disappearance of a species. Source: Extinction ↗

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More from From Cells to Species

A few more worth knowing.

  1. 20His Beagle voyage and Galápagos observations helped shape his account of natural selection.RECALL
    Charles Darwin

    Charles Darwin developed his theory of natural selection partly from observations made on the Galápagos Islands.

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  2. 21This inherited feature has been shaped by natural selection to suit an organism's environment.RECALL
    Adaptation

    An adaptation is a trait shaped by natural selection to fit an organism to its environment, like a polar bear's thick fur.

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  3. 22These animals lack a backbone and make up most known animal species.RECALL
    Invertebrates

    Invertebrates lack a backbone yet make up the vast majority of all known animal species.

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