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==Key Stage 4Foundation=====Meaning===[[Auxin]] is a [[Plant Hormones|plant hormone]] that causes [[Plant Cell|plant cells]] to elongate. ===About Auxin===: [[Auxin]] is [[photophobic]] so it will build up on the darker side of a [[plant]]. This causes [[Cell (Biology)|cells]] on the shaded side of a [[plant]] to elongate, bending a [[shoot]] towards the source of [[light]].: [[Auxin]] is found in high [[concentration]]s in [[shoot]] tips. ==Key Stage 4 Higher==
===Meaning===
[[Auxin]] is a [[Plant Hormones|plant hormone]] that causes [[Plant Cell|plant cells]] to elongate.