Plant responses

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  • Plant responses
    • Shoots grow:-towards light-against gravity
    • Roots grow:-towards moisture-in the direction of gravity
    • Plants respond to changes in light, moisture and gravity by changing how they grow
    • Growth in response to light is called PHOTOTROPISM
    • Growth in response to gravity is called GRAVITROPISM
      • Gravitropism is sometimes called geotropism. You can use either word in the exam
    • Plant hormones
      • AUXIN is the plant hormone that controls phototropism and gravitropism


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