__________ becomes available to organisms almost entirely through the metabolic activities of a few genera of bacteria.
A)Phosphorus
B)Sulfur
C)Nitrogen
D)Iron

Question

Quizplus · Accepted Answer

Nitrogen becomes available to organisms almost entirely through the metabolic activities of a few genera of bacteria that are capable of nitrogen fixation, such as Azotobacter and Rhizobium. These bacteria convert atmospheric nitrogen gas into ammonium, which can then be used by plants to make organic compounds like proteins and nucleic acids. Without these nitrogen-fixing bacteria, most organisms on Earth would not have access to nitrogen in a usable form.

__________ Becomes Available to Organisms Almost Entirely Through the Metabolic