Microbiology of Soils
Which of the following soil microorganism is involved in the reduction of sulfates to H2S?

Rhodospirillum
Rhodomicrobium
Thiobacillus thiooxidans
Desulfotomaculum

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Microbiology of Soils
Syntrophism involves

exchange of nutrients between two species
no exchange of nutrients between two species
no exchange of nutrients among species
exchange of nutrients among species

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Microbiology of Soils
Nitrogen oxidation (nitrification)refers to the

sulfur is oxidized to the sulfate form through Thiobacillus bacteria
conversion of ammonium ions into nitrates through the activities of certain bacteria.
None of these
changing of atmospheric nitrogen (N2) to nitrogen compounds

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