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More than 90 percent of all nitrogen are fixed as ammonia, nitrites, and nitrates by soil microorganisms. Symbiotic bacteria associated with leguminous plants fix nitrogen by the formation of root nodules. In which of the following plant nitrogen fixation does not occur?
This question appeared in the OPSC Prelims 2022 examination (GS). It is Question 87 out of 171 questions in this paper.
This question was part of the OPSC Prelims 2022 (GS). The OPSC Prelims examination tests candidates on general studies, current affairs, and aptitude through multiple-choice questions.
Practice previous year questions from all OPSC Prelims papers and compare patterns with UPSC Prelims PYQ to identify overlapping topics.