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A LITTLE SOMETHING WORTH KNOWING

A small discovery. Yours to pass on.

ScienceOne small ahaBiology concept

This molecule carries genetic instructions in a double helix.

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Your new ahaDNA

DNA stores information in the sequence of its nucleotide bases. Source: DNA ↗

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More from From Cells to Species

A few more worth knowing.

  1. 03These energy-converting organelles are thought to descend from once free-living bacteria.RECALL
    Mitochondria

    Mitochondria generate a cell's chemical energy and are believed to descend from ancient free-living bacteria.

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  2. 04This process changes trait frequencies when inherited differences affect survival and reproduction.RECALL
    Natural Selection

    Natural selection favors helpful traits over generations, illustrated by peppered moths shifting color amid industrial pollution.

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  3. 05This term describes change in populations' inherited characteristics over generations.RECALL
    Evolution

    Evolution describes gradual change across generations, driven largely by natural selection acting on genetic variation.

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