51. BOD of a river water is found very high. This means water
52. Which of the following has the least similarity when comparing two examples of the same biome located in different parts of the world?
53. On a clear, calm, night, the ground and air above cool mainly by this process:
54. What is desertification?
55. A great deal of indoor air pollution comes from
56. This is used as a guide to planting and for determining the approximate date for harvesting crops:
57. National Park associated with rhinoceros is
58. Endemic species are
59. In the middle latitudes of the Northern Hemisphere, surface winds tend to blow ____ and ____ around an area of surface low pressure.
60. Hot spots are regions of high
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