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Physiology

Transpiration Practice Questions

19 free Transpiration practice questions for the Botany, each with the correct answer and a detailed explanation. Open any question below, or take the full set as an interactive quiz.

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All Transpiration questions

19 questions
  1. Q1. What is the primary definition of transpiration in plants?
  2. Q2. Which of the following structures is responsible for the majority (about 90%) of transpiration in most terrestrial plants?
  3. Q3. The cells that surround the stomatal pore and control its opening and closing are called:
  4. Q4. Which instrument is used to measure the rate of transpiration by measuring the amount of water absorbed?
  5. Q5. How does an increase in external humidity affect the rate of transpiration?
  6. Q6. The 'transpiration pull' or suction force that pulls water up from the roots is best explained by which theory?
  7. Q7. During the day, stomata usually open due to the influx of which ions into the guard cells?
  8. Q8. What is the term for the loss of liquid water droplets from the margins of leaves, often mistaken for dew?
  9. Q9. Which of the following is an adaptation in xerophytes (desert plants) to reduce transpiration?
  10. Q10. In dorsiventral leaves (dicots), stomata are typically more numerous on the:
  11. Q11. Which plant hormone is known as the 'stress hormone' because it induces stomatal closure during water scarcity?
  12. Q12. Which of the following environmental factors will significantly increase the rate of transpiration?
  13. Q13. Stomata that remain open at night and closed during the day are characteristic of:
  14. Q14. The 'Wilting Point' of a plant refers to the stage where:
  15. Q15. What happens to the rate of transpiration when light intensity increases?
  16. Q16. Which structure allows for 'Lenticular Transpiration'?
  17. Q17. The movement of water through the cell walls and intercellular spaces (not crossing the plasma membrane) is called:
  18. Q18. Which of the following chemical substances can act as an 'antitranspirant'?
  19. Q19. In a transpiring plant, the water potential is lowest in the: