C3.1 Integration of body systems Quiz
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5 questions, one answer each
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1. Auxin can:
- A. diffuse out of cells but not in
- B. diffuse into cells but not out
- C. only move in the phloem
- D. only move in the xylem
2. Auxin loosens plant cell walls by:
- A. digesting cellulose with enzymes
- B. causing H⁺ secretion into the apoplast
- C. increasing cell division
- D. removing water from the wall
3. Cytokinin is mainly produced in:
- A. shoot tips
- B. root tips
- C. fruits
- D. leaves only
4. The benefit of positive feedback in fruit ripening is that ripening is:
- A. slowed down
- B. rapid and synchronized
- C. prevented in dark
- D. limited to one fruit
5. Which structure sends impulses to the heart to change heart rate?
- A. Cerebellum
- B. Pineal gland
- C. Medulla
- D. Pituitary gland