character: Nitrogen Fixation
topic: The process through which nitrogen gas is converted into ammonia by bacteria
grade: 9
subject: Science
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character: Rhizobium
topic: A genus of bacteria known for fixing nitrogen in leguminous plants
grade: 9
subject: Science
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character: Ammonia
topic: The product of nitrogen fixation, used as a nutrient by plants
grade: 9
subject: Science
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character: Denitrification
topic: The process by which bacteria convert nitrates back into nitrogen gas, completing the nitrogen cycle
grade: 9
subject: Science
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