51. The development of a bare area without any life form is called
52. _________ is a long term pattern of weather at a particular area.
53. The lowest temperature is usually observed:
54. Species that occur in different geographical regions separated by special barrier are:
55. The crucial species that determine the ability of large number of other species is termed as _________ species.
56. World's first Teak Forest was planted in 1842 in Kerala. Identify the place.
57. Pottery workers are at high risk of __________ lung disease.
58. The strongest radiation inversions occur when
59. The darkening of the skin due to arsenic poisoning is called
60. A change of one degree on the Celsius scale is ____ a change of one degree on the Fahrenheit scale.
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