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===Meaning===
[[File:Bacteria.png|right|300px|thumb|A [[Magnify|magnified]] image of several '''bacteria'''.]]
[[Bacteria ]] are [[unicellular]] [[micro-organism]]s that have no [[nucleus]], [[mitochondria]] or [[chloroplast]] but do have [[cytoplasm]], a [[cell membrane]] and a [[Cell Wall|cell wall]].
: Singular [[Noun]]: '''Bacterium'''
: [[Bacteria]] can cause disease but some are important to keep us healthy.
: Some [[bacteria]] have a tail called a [[flagellum]].
: [[Bacteria]] do not have a [[Cell Nucleus|nucleus]].: The [[DNA]] of [[bacteria]] is in a loop. There are also smaller loops rings of [[DNA]] called [[plasmid]]s.
{| class="wikitable"
| style="height:20px; width:200px; text-align:center;" |A [[diagram]] showing the features of a '''bacterium'''.
|}
==Key Stage 3==
===Meaning===
[[Bacteria]] are [[unicellular]] [[Prokaryotic Cell|prokaryotes]] (with no [[membrane]] bound [[organelle]]s).
===About Bacteria===
: [[Bacteria]] can cause disease but some are important to keep us healthy.
: Some [[bacteria]] have a tail called a [[flagellum]] propel it move through [[water]].
: Some [[bacteria]] are encased in a [[Slime Capsule|slime capsule]] which protects them from some [[toxic]] [[chemical]]s.
: [[Bacteria]] do not have a [[Cell Nucleus|nucleus]].
: The [[DNA]] of [[bacteria]] is in a loop. There are also smaller rings of [[DNA]] called [[plasmid]]s.