Plant Hormones Quiz
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5 questions, one answer each
Each answer is checked as you go, with why.
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1. What is a tropism?
- A. A hormone controlling flowering
- B. Growth response to a directional stimulus
- C. A type of cell division
- D. Seed germination process
2. In a shoot with light from one side, where does auxin accumulate?
- A. Evenly
- B. Light side
- C. Shaded side
- D. Root tip only
3. Commercial use of gibberellins?
- A. Killing weeds
- B. Producing seedless fruit
- C. Ripening fruit for sale
- D. Stimulating root growth
4. Horizontal root in darkness: growth outcome and reason?
- A. Bends up like shoots
- B. Bends down as auxin inhibits lower-side growth
- C. Grows straight, no response
- D. Bends down as auxin promotes upper-side inhibition
5. Grower wants unripe fruit to ripen before sale. Which hormone and why?
- A. Auxin, stimulates elongation
- B. Gibberellin, ends dormancy
- C. Ethene, controls/triggers ripening
- D. Auxin, speeds rooting