Bacteria that convert nitrates into free nitrogen are:
Correct answer: B. Denitrifying
- A. Ammonifying
- B. Denitrifying
- C. Nitrifying
- D. Nitrogen-fixing bacteria
Explanation
Denitrifying bacteria are responsible for converting nitrates (NO3-) into free nitrogen gas (N2) through a process known as denitrification. This process helps to return nitrogen in the environment back to its atmospheric form, completing the nitrogen cycle. Denitrification occurs in anaerobic conditions (environments with little to no oxygen), where these bacteria use nitrates as an alternative source of oxygen, leading to the production of nitrogen gas.
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Biological classification uses taxonomic ranks, binomial nomenclature and shared characteristics to organize life into kingdoms. The major groups include prokaryotes, protists, fungi, plants and animals, with comparisons based on cell type, cell wall, nutrition, body organization, reproduction and evolutionary relationships; prokaryotes lack a membrane-bound nucleus.
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