Q51. The group of minerals chemically containing hydrocarbons is
Q52. The highest degree of concentration of mineral deposits are found in
Q53. With the disintegration of USSR in end 1991, comprised of ____ Union Republics.
Q54. Which of the following is tropical grassland?
Q55. The habitats valuable for commercially harvested species are called
Q56. Without ____ the equator would be much hotter than it is while the poles would be much cooler.
Q57. The landmass of which of the following continents is the least?
Q59. The headquarters of the Commonwealth of Independent States (CIS), formed out of erstwhile USSR, is at
Q60. The knowledge about the topography of the ocean basins has been derived from

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