SSC General Science & Technology Sample Paper NCERT Sample Paper-6

  • question_answer
    Which of the following is a pair of biofertilizers?

    A)  Azolla and BGA  

    B)          Nostoc and legumes

    C)  Rhizobium and Nicotiana  

    D)  Salmonella and E.coli

    Correct Answer: A

    Solution :

    [a] Biofertilizers are organisms which can bring about soil nutrient enrichment. The pair of biofertilizer is Azaliaand BGA (blue-green algae). Azaliais a small, fast growing fem that occurs on floating water and BGA or cyanobacteria are found in sea and fresh water.

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