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==Key Stage 3==
===Meaning===
[[File:GrowthMedium.png|right|300px|thumb|A '''growth medium''' in a [[Petri Dish|petri dish]].]]
A '''growth medium''' is a material used to feed and grow colonies of [[micro-organism]]s.
===About Growth Media===
: A '''growth medium''' contains [[nutrient]]s to feed [[micro-organism]]s.
: A '''growth medium''' is usually contained in a [[Petri Dish|petri dish]].
: A common '''growth medium''' is [[agar]] jelly with a [[nutrient]] mixture.
==Key Stage 4==
===Meaning===
[[File:GrowthMedium.png|right|300px|thumb|A '''growth medium''' in a [[Petri Dish|petri dish]].]]