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    Question

    Horizontal growth of seedling, swelling of axis and

    apical hook formation of dicot seedlings are associated with-
    A Photoperiodism Correct Answer Incorrect Answer
    B Vernalisation Correct Answer Incorrect Answer
    C Ethylene Correct Answer Incorrect Answer
    D Cytokinin Correct Answer Incorrect Answer

    Solution

    Ethylene is a plant hormone known for its role in various aspects of plant development including the horizontal growth (also known as apical hook formation in seedlings). It promotes growth adaptations under stress conditions, such as mechanical pressure or water saturation, and plays a crucial role in the regulation of seedling growth direction and structure.

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