1. In a potometer experiment, a student notices the air bubble is not moving despite bright sunlight. Which of the following is the most likely experimental error?
2. Why is the twig cut obliquely (diagonally) under water before fixing it into the potometer?
3. A plant is covered with a polythene bag. After an hour, droplets appear inside. Which control setup is required to prove these droplets come from the plant and not the soil?
4. If the upper surface of a dorsiventral leaf is coated with vaseline, the rate of transpiration will:
5. Which of the following is a limitation of using a Potometer to measure transpiration?
6. A Cobalt Chloride paper is attached to both surfaces of a leaf. The paper on the lower surface turns pink in 2 minutes, while the upper takes 15 minutes. This proves:
7. In an experiment to show that "light" affects transpiration, the rate is found to be higher in the sun than in the shade. The expert biological reason is:
8. What happens to the rate of transpiration if a plant is kept under a high-speed fan?
9. A clinician observes that a plant is "Wilting" even though the soil is wet. This could be due to:
10. Why is "distilled water" often avoided in potometer experiments unless necessary?
11. In a "Bell Jar" experiment, why is a glass sheet used as a base and smeared with vaseline?
12. If a researcher treats a leaf with "Abscisic Acid," what will be the clinical effect on the potometer reading?
13. In the experiment using three test tubes (A: Water + Plant, B: Water + Oil + Plant, C: Water + Oil), which tube is the 'Control'?
14. Why do xerophytes have "thick waxy cuticles"?
15. A student uses a "weighing method" to measure transpiration. The plant is in a sealed pot. If the initial weight is 500g and final weight is 480g, the 20g loss represents:
16. Why does "Atmospheric Pressure" decrease with altitude, and how does it affect transpiration in mountain plants?
17. In the "Cobalt Chloride" experiment, what is the role of "Glass Slides" clipped onto the leaf?
18. If a plant has "Narrow leaves" and "Spines," it is likely adapted to:
19. Which process is responsible for the "suction force" that pulls water into the potometer twig?
20. In an experiment, if a leaf is coated with oil on both sides, what will happen to its temperature in bright sun compared to a normal leaf?
