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    Question

    Phototropism requires changes in ______mobilization.

    A Gibberellin Correct Answer Incorrect Answer
    B Brassinosteroids Correct Answer Incorrect Answer
    C Auxin Correct Answer Incorrect Answer
    D Cytokinin Correct Answer Incorrect Answer

    Solution

    Phototropism, which is the growth of a plant in response to light, requires changes in auxin mobilization. Auxin accumulates on the darker side of the plant, stimulating elongation and causing the plant to bend towards the light.

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