Biology Practice: Absorption by Roots (Mock Test 4 - Expert Experimental & Clinical Logic)
1. In an experiment, a marine plant is suddenly shifted to a freshwater pond. What will be the most likely cellular observation?
2. A leafy shoot is weighed and then kept in the sun for 2 hours. It is weighed again and found to be lighter. What experimental conclusion can be drawn?
3. Why do fertilizer manufacturers warn against "over-fertilizing" dry soil?
4. A thistle funnel experiment is set up with a concentrated sugar solution inside and pure water outside. If the level of liquid in the tube stops rising, it indicates:
5. In a "Girdling" experiment, the bark of a tree is removed in a ring, but the xylem is left intact. What will be the first clinical observation?
6. If a cell with an osmotic pressure of 10 atm is placed in a solution with an osmotic pressure of 15 atm, what is the logical result?
7. A plant is treated with a chemical that inhibits mitochondrial respiration in the roots. Which process is hindered most?
8. In the "Potato Osmoscope" experiment, why is the potato peeled at the bottom?
9. Which experimental setup would best demonstrate "Root Pressure"?
10. A fresh balsam plant is kept in Eosin solution (red dye) for an hour. On taking a cross-section of the stem, which part will appear red?
11. If a plant cell is placed in a solution and no change in volume is observed, the solution is clinically described as:
12. During the rainy season, wooden window frames become tight. This is due to which physical logic?
13. In a laboratory test, a plasmolysed cell is placed in distilled water. The process that will occur is:
14. Why do roots die in waterlogged soil despite the presence of abundant water?
15. What is the logical outcome of a cell reaching its "Elastic Limit" during water absorption?
16. When common salt is applied to weeds in a courtyard, they die. The expert reason is:
17. A concentrated sugar solution has a _____ osmotic pressure and a _____ water potential.
18. If the root hair cell sap is isotonic to the soil water, what happens to water movement?
19. In a clinical case of "Fertilizer Burn," why do the leaves of the plant turn brown first?
20. What is the experimental significance of using "Semi-permeable" membranes like cellophane in osmosis models?
