Transpiration: Factors and Mechanism Practice Questions
20 free Transpiration: Factors and Mechanism practice questions for the NCERT Biology, each with the correct answer and a detailed explanation. Open any question below, or take the full set as an interactive quiz.
Questions
20 questions
All Transpiration: Factors and Mechanism questions
- Q1. Which of the following is the primary purpose of transpiration in plants?
- Q2. The immediate cause of the opening or closing of the stomata is a change in the:
- Q3. The inner wall of each guard cell (towards the stomatal aperture) is:
- Q4. Which orientation of cellulose microfibrils in the cell walls of guard cells facilitates stomatal opening?
- Q5. Which of the following is NOT an external factor affecting the rate of transpiration?
- Q6. The transpiration driven ascent of xylem sap depends mainly on which physical property of water?
- Q7. How much of the water reaching the leaves is typically used in photosynthesis and plant growth?
- Q8. Transpiration helps cool a leaf's surface mainly through which mechanism?
- Q9. In a dorsiventral (dicotyledonous) leaf, stomata are usually:
- Q10. Which process describes the 'Cohesion-Tension-Transpiration Pull' model?
- Q11. Which of the following describes the relationship between humidity and transpiration rate?
- Q12. The evolution of the C4 photosynthetic system is probably a strategy to:
- Q13. Water molecules remain attached to each other in the xylem column due to:
- Q14. The 'tensile strength' of water in xylem refers to its ability to:
- Q15. In isobilateral leaves, stomata are:
- Q16. What happens to the guard cells when they lose water?
- Q17. Transpiration is often called a 'necessary evil' because:
- Q18. The ability of water to rise in thin tubes is called:
- Q19. During transpiration, water is lost from the leaf through:
- Q20. High wind speed generally ________ the rate of transpiration initially by ________ the boundary layer.