What for Nucleopolyhydro viruses are being used now a days? from
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    Microbes in Human Welfare

    Multiple Choice QuestionsShort Answer Type

    61. Define BOD and COD.
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    62. Do you think microbes can be used as source of energy ? If yes, how ?
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    63. Microbes can be used to lessen the burden of use of chemical pesticides. Explain how this can be accomplished.
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    64. Write a short note on natural insecticides.
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    65. What is biopesticide ? Give a few examples.
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    66. What for Nucleopolyhydro viruses are being used now a days?

    The nucleopolyhedro virus (NPV) belongs to the family Baculoviruses is a virus that affects insects, predominantly moths and butterflies. It has been used as a biopesticide for crops infested by insects.
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    67. What are biofertilizers ? Name two organims which fix nitrogen asymbiotically and two organisms with fix symbiotically.
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    68. Why are biofertilizers or biopesticides preferred to chemical fertilizers or pesticides ?
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    69. What is biogas ?
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    70.

    Why is the biogas plant usually built in the rural area?

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