Microbiology of Soils
Which of the following is capable of oxidizing sulfur to sulfates?

Desulfotomaculum
Rhodomicrobium
Rhodospirillum
Thiobacillus thiooxidans

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Microbiology of Soils
The groups of symbiotic bacteria, which have the ability to fix nitrogen

derive their food and minerals from the legume, and in turn they supply the legume with some or all of its nitrogen
All of these
these bacteria are from the genus, Rhizobium
grow together for a mutual benefit is called symbiosis and so these bacteria are called symbiotic nitrogen-fixing bacteria

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