Biology Practice: Transport in Plants (Mock Test 4 - Expert/Experimental)
1. In a bell-jar experiment, if a well-watered potted plant is covered and kept in sunlight, why do water droplets appear on the inner walls of the jar?
2. In a 'Girdling Experiment' (Ring experiment), the tissue removed is the phloem. Which part of the plant will swell up first?
3. When using a Ganong's Potometer, what does the movement of the air bubble directly measure?
4. Why is a layer of oil added to the water in an experiment designed to measure transpiration weight loss?
5. If Cobalt Chloride paper turns from Blue to Pink when placed on a leaf, it indicates:
6. In a dorsiventral leaf, why does the Cobalt Chloride paper on the lower surface turn pink faster than on the upper surface?
7. A plant is kept in a solution containing red dye (Eosin). After some time, the stem is cut. Which tissue will appear red?
8. What is a significant limitation of using a potometer to measure transpiration?
9. In an experiment to demonstrate root pressure, a manometer is attached to a cut stem. The liquid in the manometer rises because of:
10. If we apply Vaseline to both surfaces of a leaf, what will be the effect on its weight over 24 hours?
11. A saltwater fish placed in a freshwater tank dies. This is a clinical/experimental example of:
12. During the 'Thistle Funnel Experiment', the level of liquid in the tube rises because:
13. In the girdling experiment, why do the roots eventually die?
14. What happens to the rate of transpiration if a plant is placed under a fast-moving fan?
15. Why does an air bubble in a potometer stop moving if the plant is kept in a dark cupboard?
16. To ensure a potometer works accurately, it must be:
17. In the experiment using 'Balsam Plant', why is this specific plant preferred?
18. If the air bubble in a potometer reaches the end of the capillary tube, how is it reset?
19. In a plasmolysis experiment, what is the 'gap' between the shrunken protoplast and the cell wall filled with?
20. What is the logical reason for cutting the twig under water before fixing it in a potometer?
