The substance related to phototropism in the | vedclass

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(C) Auxin concentration increases in the shaded area (the side opposite to the light source).Increased auxin concentrations stimulate cell elongation

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Auxin

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(C) Auxin concentration increases in the shaded area (the side opposite to the light source).Increased auxin concentrations stimulate cell elongation in the shoot.Therefore,the shaded side shows more growth compared to the side facing the light.This differential growth causes the shoot to bend towards the light,a phenomenon known as phototropism.

The substance related to phototropism in the shoot is

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