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ICSE Biology plant Physiology give reasons

4 pages, 50 questions, 24 questions with responses, 25 total responses,

Siddharth Chhetri
Sarwan Memorial School (SMS), Banarhat, Jalpaiguri

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PLANT PHYSIOLOGY : GIVE REASON/EXPLAIN/COMMENT. Salt and sugar are used in preserving food. 2. Some plants show wilting of their leaves during day even when the soil is well watered. 3. On sprinkling common salt on a grass growing in a lawn the grass is killed. 4. Wilted lettuce leaves if kept in cold water become crisp. 5. Plants growing in fertilized soils are often found wilted if the soil is not adequately watered. 6. Wooden frames of doors get jammed during the monsoon season. 7. Why plant begins to die when excess of soluble fertilizers is added to soil. 8. Strips of potato placed in 50% sucrose solution appears soft and shriveled. 9. Root hairs becomes flaccid when fertilizer are added to the moist soil around it. 10. Transplanting of seedling to a flower bed in the evening is better than doing so in the morning. 11. Grapes shrink when immersed in a very strong solution. 1. PLANT PHYSIOLOGY : GIVE REASON/EXPLAIN/COMMENT. A higher rate of transpiration is recorded on a windy day rather than in a calm day. 13. Leguminous crops act as fertilizers 14. Plants growing in a fertilized soil are often found to wilt if the soil is not adequately watered. 15. It is advisable not to sleep under a tree at night. 16. A tiger owes its existence to chlorophyll. 17. On a bright sunny day the leaves of certain plants roll up. 18. Marine fishes burst when thrown under tap water. 19. Xerophytes have their leaves modified to spines or reduced in size. 20. Green leaves are thin and board. 21. Balsam plants wilt during midday even if the soil is well watered. 22. Photosynthesis is considered as a process supporting all life on earth. 23. Potato cubes when placed in water become firm and increase in size. 24. Pickles can be preserved by adding salt to it. 12. PLANT PHYSIOLOGY : GIVE REASON/EXPLAIN/COMMENT. The raisins swell up when kept in water. 26. Weeds can be killed by adding salt to it. 27. Why do plants absorb more water than required. 28. Chlorophyll is necessary for photosynthesis. 29. Light reaction is called photochemical phase. 30. Dark reaction is called biosynthetic phase. 31. Chloroplasts are called energy converters. 32. The leaves of mimosa pudica plant droop when touched. 33. Herbaceous plants growing in a well watered soil are found to wilt on a hot day. 34. Transpiration cools the plants. 35. More transpiration occurs from the lower surface of the dorsi ventral leaves. 36. Anti transpirants can be used to keep cut flowers fresh for a long time. 37. Water droplets are seen in a polythene bag containing leafy vegetable. 38. In most experiments on photosynthesis , a destarched plant is used. 39. Oxygen is a waste product of photosynthesis. 25. PLANT PHYSIOLOGY : GIVE REASON/EXPLAIN/COMMENT. If you uproot a plant from the soil, its leaves soon wilt. 41. Soaked seeds swell up and bursts their seeds coats. 42. Watered transpired is water absorbed. 43. Cork and bark of trees help in preventing loss of water. 44. Most leaves have a upper surface more green and shiny than the lower one. 45. It is not possible to demonstrate respiration in a green plant kept in sunlight. 46. Fresh water fish cannot survive in sea water. 47. A closed can of dried seeds bursts open if some water is added accidently. 48. We gargle with saline water during throat infections . 49. Bacteria and viruses do not grow in jams ,pickles and squashes 50. Transpiration is a necessary evil. 40.

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