You acquire a soil sample and run an enrichment culture on it. You provide the organisms in the culture with all of the ingredients required for growth except for nitrogen. What result do you expect to have at the end of your experiment?
A) Nitrogen-fixing bacteria will significantly outnumber those incapable of fixing nitrogen.
B) Nitrogen-fixing bacteria will not be present in the culture.
C) Nitrogen-fixing bacteria will be present but not as significantly greater number than non-nitrogen-fixing species.
D) Nitrogen-fixing bacteria will be present, but will be significantly outnumbered by non-nitrogen-fixing species.
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