Basic Questions on "Absorption by Roots"

1.    Write two functions of root?

2.    Write the functions of xylem and phloem.

3.    What is the use of water in the process of photosynthesis?

4.    What is the use of water in the process of transpiration?

5.    Why is water needed in transportation of substances in plants?

6.    Write the mechanical function of water in plants.

7.    What is the use of mineral nutrients in plants?

8.    Write characteristics of roots in absorbing water.(three characteristics)

9.    Are root hair cells unicellular or multicellular?

10. Write two characteristics of cell wall.

11. Why does cell wall allows movement of water molecules and dissolved substances freely in and out of cell?

12. Write two characteristics of cell membrane

13.  What do you mean by semi permeable nature of cell membrane?

14. Define: Imbibition, Diffusion, Osmosis, Active transport, Passive transport, Turgidity and Flaccidity.

15. What are hydrophilic substances?

16. Why do dry seeds, wooden doors swell up on contact with water or on exposure to moist air?

17. What is imbibitional pressure?

18. What is ascent of sap?

19. What do you mean by higher concentration of molecules and lower concentration of molecules?

20. Define Solute, Solvent and solution.

21. Write the difference between endosmosis and exosmosis.

22. Define hypertonic, hypotonic and isotonic solutions.

23. What is homogeneous solution?

24. Which is a dilute solution distilled water or sugar solution?

25.  Explain thistle funnel experiment with help of diagram.

26. What would happen if we will use cellophane paper in place of plasma membrane in thistle funnel experiment?

27. What would happen if we will use rubber sheet in place of plasma membrane in thistle funnel experiment?

28. What would happen if we will use muslin cloth in place of plasma membrane in thistle funnel experiment?

29. What is visking bag?

30. What is osmotic pressure?

31. Write difference between diffusion and osmosis.

32. Write difference between active transport and passive transport.

33. What is turgidity?

34. What is flaccidity?

35. What is turgor pressure?

36. A seed soaked in water will become turgid after some time. How?

37.  What is flaccidity?

38. A cell is paced in a solution whose concentration is equal to concentration of its cytoplasm, what type of solution it will be?

39. A cell is paced in a solution whose concentration is more than the concentration of its cytoplasm, what type of solution it will be?

40. A cell is paced in a solution whose concentration is less than the concentration of its cytoplasm, what type of solution it will be?

41. A cell is paced in a solution whose concentration is less than the concentration of its cytoplasm, what changes will take place in cell after a certain period of time?

42. A cell is paced in a solution whose concentration is more than the concentration of its cytoplasm, what changes will take place in cell after a certain period of time?

43. A cell is paced in a solution whose concentration is equal to concentration of its cytoplasm, what changes will take place in cell after a certain period of time?

44. When does the plasmolysis take place in cell?

45. What will happen to red blood cells, if they will be kept in distilled water for some time?

46. What will happen to red blood cells, if they will be kept in hypertonic solution for some time?

47. What will happen to red blood cells, if they will be kept in isotonic solution for some time?

48. What is deplasmolysis?

49. Give reason for wilting of leaves of plant?

50. When do leaves of plant become turgid?

51. Sometimes, the roots of certain trees have been seen to crack the walls or a concrete floor .Give reason.

52. Explain bleeding in plants with help of diagram?

53. Why do guard cells become flaccid at night?

54. Give reason for rapid drooping of leaves of mimosa pudica.

55. What is pulvinus?

56. If you cut off the shoot of a plant, the water pushes out from the root stump. Give reason.

57. What is guttation?

58. What is root Pressure?

59. Explain cell-to-cell conduction of water from root hair to xylem.

60. Explain absorption of mineral elements in plants with help of diagram.

61. What is girdling?

62. Explain the forces contributing to ascent of sap.

63. Explain down movement of sap with help of diagram.

64. How will you prove that xylem conducts water?

65. How will you prove that food from leaves is conducted downward through the phloem in stem?

66. How will you prove that water inside the coconut comes from the ground?

67. Can you guess from where the sweet taste of the “coconut milk” comes?