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A LITTLE SOMETHING WORTH KNOWING

A small discovery. Yours to pass on.

ScienceOne small ahaBiology concept

The basic unit of life, arising from a pre-existing unit of the same kind.

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Your new ahaThe Cell

The Cell: Basic structural and functional unit of every living organism. Source: Cell (biology) ↗

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More from From Cells to Species

A few more worth knowing.

  1. 02This molecule carries genetic instructions in a double helix.RECALL
    DNA

    DNA carries genetic instructions in a double helix structure first described by scientists in 1953.

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  2. 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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  3. 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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