61. Sewage treatment in which a portion of decomposer bacteria present in waste is recycled into the beginning of the process
62. Guano is a major source of
63. Which one of the following is an indirect ecological factor?
64. Counter current flow of scrub solution and the gas stream is effective in trapping
65. Phenolpthalein alkalinity is also known as
66. Major aerosol pollutant in jet plane emission is
67. Biogeochemical cycling means
68. National Biodiversity Strategy and Action Plan (NBSAP) was established in
69. Which of the following is a correct sequence of carbon cycle?
70. The market value in current rupees or dollars of all goods and services, for final use, produced by an economy during a year is
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