Which one of the following is a genetically improved bacterium used for pollution control?

  • A
    Pseudomonas
  • B
    Rhizobium
  • C
    Nitrobacter
  • D
    Nitrosomonas

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Why is $Trichoderma$ fungus used?

The utility of a microorganism like $Trichoderma$ $harzianum$ has been proven in which of the following?

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Match the bio-insecticides in List-$A$ with their respective plant/organism sources in List-$B$ and select the correct option.
List-$A$List-$B$
$(a)$ Rotenone$(1)$ Derris elliptica
$(b)$ Nimbin$(2)$ Azadirachta indica
$(c)$ Pyrethrum$(3)$ Chrysanthemum cinerariifolium
$(d)$ Thurioside$(4)$ Bacillus thuringiensis

Which of the following is an incorrect pair?

Growth of water hyacinth is controlled by . . . . . . .

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