plant hormones

    Cards (13)

    • What should you be able to describe by the end of the video?
      How plants use hormones to respond to light and gravity
    • What is phototropism?
      Growth of plant shoots towards light
    • What hormone is suggested to control phototropism?
      Auxin
    • What happened when scientists removed the tips of the shoots?
      The shoots did not go towards the light
    • What does covering the tips of the shoots with foil indicate?
      Tips are sensitive to light
    • What was the result when the lower parts of the shoots were covered with foil?
      The shoots grew towards the light as normal
    • How do shoots use auxin to grow towards light?
      • Auxin produced at the tip of the shoot
      • Auxin triggers cell growth
      • Light causes auxin to concentrate on the darker side
      • Cells on the darker side grow faster
      • Shoots bend towards the light
    • What is gravitropism also known as?
      Geotropism
    • How does gravity affect auxin in roots?
      Gravity causes auxin to concentrate on the lower side
    • What is the effect of auxin on root cell growth?
      Auxin inhibits cell growth in roots
    • What are the roles of gibberellins and ethylene in plants?
      • Gibberellins: Start germination of seeds
      • Ethylene: Controls cell division and fruit ripening
    • What type of students need to know about gibberellins and ethylene?
      Higher-tier students
    • Where can students find more questions on plant hormones?
      In the vision workbook