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==Key Stage 3==
===Meaning===
A '''stem cell''' is a [[Cell (Biology)|cell]] which can change to become other types of [[Cell (Biology)|cells]] in an [[organism]].
===About Stem Cells===
: In an [[embryo]] '''stem cells''' become all the different [[Specialised Cell|specialised cells]] in an [[animal]] before it becomes a [[foetus]].
==Key Stage 4==
===Meaning===