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Microbes in Human Welfare — BIOLOGY STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceBIOLOGYMicrobes in Human Welfare1 Mark
MCQ
Yield of paddy field can be increased by application of:
  • A
    Iron bacteria
  • B
    Nostoc/ Anabaena
  • C
    Archae bacteria
  • D
    Symbiotic bacteria
✓

Answer

  1. Nostoc/ Anabaena

Explanation:

Blue-green algae are ideally suited for propagation in rice fields because blue -green algae form a self-sufficient system which is capable of fixing atmospheric nitrogen in organic forms and which grows upon a free water surface. It increases nitrogen content of moist soil and water bodies, which can be used in increasing paddy yield.

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