The '''cell''' is the smallest unit of life capable of independently reproducing itself. It is a small, watery, compartment filled with chemical-based machinery and a complete copy of the organism's [[genome]].
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The '''cell''' is the smallest unit of life capable of independently reproducing itself. It is a small, watery, compartment filled with chemical-based "machinery".
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There are two main types of cells: prokaryotic<ref name="spell">Also spelled ''procariotic'' or ''procaryotic'' and ''eucariotic'' and ''eucaryotic''.</ref> cells, which lack a nucleus, and eukaryotic<ref name="spell" /> cells, with a nucleus separated from cytoplasm by a nuclear membrane.
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{{quotebox|The cell is so enormously complex that it makes a spaceship or a supercomputer look rather low-tech in comparison. --[[Phillip E. Johnson]] [http://www.pbs.org/wgbh/nova/id/defense-id.htm]}}
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There are two main types of cells: prokaryotic<ref name="spell">Also spelled ''procariotic'' or ''procaryotic'' and ''eucariotic'' and ''eucaryotic''.</ref> cells, which lack a nucleus, and eukaryotic<ref name="spell" /> cells, with a nucleus separated from cytoplasm by a nuclear membrane. each cell contains a complete copy of the organism's [[genome]].
A [[bacterium]] is a simple cell without a [[nucleus]] to protect its [[genetic information]].
A [[bacterium]] is a simple cell without a [[nucleus]] to protect its [[genetic information]].