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==Key Stage 34==
===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[[health]]y.: [[Disease]] causing [[bacteria]] are known as [[Pathogenic Bacteria|pathogenic bacteria]].
: 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 [[phagocyte]]s and 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.