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Q.6. How does phototropism occur in plants?
Answers (1)
Phototropism is the movement of any part of the plant due to light. Positive phototropism is shown by the shoot of the plant and the root shows negative phototropism. This phenomenon is due to the plant hormone, called auxin. When light falls on one side of the plant, the auxin hormone shifts towards the other side, which is away from the light. Thus auxin causes growth in the length of the cells in the shady part. As a result, the plant appears to bend towards the sun.
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