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Question
What is phototropism? Show phototropism in plant with the help of a labelled diagram.
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Solution
Phototropism is the growth towards the source of light. This type of movement is observed in plants. The cells on the plant that are far from the source of light produce a hormone called auxin. This chemical is stimulated and reacts during phototropism. This causes the plant cells on the side away from the source of light to elongate.
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