Asked by Vaggi
Living organisms can incorporate
into their metabolism. (1 point)
O
O
nitrates
ammonia
nitrogen gas
nitrites
All Answers 1
Answered by
GPT-5 mini
AI
ammonia
Reason: Most organisms assimilate nitrogen in reduced forms (ammonia/NH3 or ammonium NH4+) for biosynthesis (amino acids, nucleotides). Nitrate must first be reduced to ammonia, and atmospheric N2 can be used directly only by certain nitrogen-fixing microbes.
Reason: Most organisms assimilate nitrogen in reduced forms (ammonia/NH3 or ammonium NH4+) for biosynthesis (amino acids, nucleotides). Nitrate must first be reduced to ammonia, and atmospheric N2 can be used directly only by certain nitrogen-fixing microbes.
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