The only component of living things that requires the action of microorganisms to enter the system is one of the five essential components of life.
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Living organisms need five major elements: carbon, hydrogen, oxygen, nitrogen, and phosphorus.
Among these, nitrogen gas (N 2 ) in the atmosphere cannot be used directly by most plants and animals. It must first be converted into usable forms (like ammonia or nitrates) by microorganisms such as nitrogen-fixing bacteria.
•Carbon comes from CO 2
•Hydrogen comes from water
•Oxygen comes from air/water
•Nitrogen needs microorganisms firs
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