May/June 2026 Paper 21

2026 · 40 questions · 40 parts · 40 marks

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23Plant Responses Growth RegulatorsEasy1 mark
Which experiments could be used to demonstrate gravitropism in a shoot?
  1. 1
    a horizontal shoot that is grown in the dark
  2. 2
    a horizontal shoot that is grown in the light
  3. 3
    a shoot that is grown upright in the dark
  4. 4
    a shoot that is grown upright in the light