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Q. Which feature of some species of blue-green algae helps to promote them as bio-fertilisers?

  • (A) They have the mechanism to convert atmospheric nitrogen into a form that the crop plants can absorb readily
  • (B) They induce the crop plants to produce the enzymes which help convert atmospheric nitrogen to nitrates
  • (C) They induce the roots of the crop plants to absorb the soil nitrates in larger quantities
  • (D) They convert atmospheric methane into ammonia, which the crop plants can absorb readily
  • Correct Answer - Option(A)
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