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Auxin: The First Plant Hormone
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Auxin: The First Plant Hormone

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Questions and Answers

What is the main role of auxin in plants?

  • Promoting photosynthesis
  • Increasing leaf thickness
  • Enhancing root growth
  • Regulating plant cell elongation (correct)

    • Who is attributed with the discovery of auxin?

  • Louis Pasteur
  • Gregor Mendel
  • Frits Went
  • Charles Darwin and Francis (correct)

    • What did Darwin and his son observe in their experiments with coleoptiles?

  • Thickening of stem tissues
  • Enhanced leaf coloration
  • Root development in canary grass
  • Growth of coleoptiles towards light (correct)

    • When was the growth promoting chemical that was later named auxin first demonstrated?

    <p>1926</p> Signup and view all the answers

    What happens to the coleoptile if the tip is covered with tin foil during Darwin's experiment?

    <p>The coleoptile does not bend towards light</p> Signup and view all the answers

    Where is the region responsible for bending towards light located in the coleoptile?

    <p>Several millimeters below the tip</p> Signup and view all the answers

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