In plants,phototropism is the movement:

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(A) Phototropism is the growth or movement of a plant part in response to a light stimulus. Specifically,positive phototropism refers to the growth of

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Towards the light source

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(A) Phototropism is the growth or movement of a plant part in response to a light stimulus. Specifically,positive phototropism refers to the growth of plant organs,such as stems,towards the light source. Charles Darwin and his son Francis Darwin observed that the coleoptiles of canary grass respond to unilateral illumination by bending and growing towards the light source.

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