Nitrogen Cycle
Published on Nov 18, 2015
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PRESENTATION OUTLINE
NITROGEN CYCLE
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DEFINITION
- the series of processes by which nitrogen and its compounds are interconverted in the environment and in living organisms, including nitrogen fixation and decomposition.
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- A type of bacteria called nitrogen fixing bacteria in roots and nodules converts nitrogen gas to nitrate compounds. The bacteria takes in atmospheric nitrogen and produces ammonia.
- Other bacteria use the ammonia to produce nitrites and nitrates, which are nitrogen and oxygen containing compounds
- Plants use the nitrates and nitrites to make amino acids which are used to make plant proteins.
Photo by mark3186
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- 4. Plants are consumed by other organisms. They use the plant amino acid to make their own.
- 5. Decomposers convert nitrogen found in other organisms into ammonia and it returns to the soil. A few types of bacteria return nitrogen back into the atmosphere by the process of denitrification.
Photo by amira_a
