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Microbiology of Soils

Microbiology of Soils
The breakdown of cattle manure in biogas is accomplished by which of the following type of bacteria?

Hydrolytic
Transitional
All of these
methanogenic

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Microbiology of Soils
The phenomenon of commensalism refers to a relationship between organisms in which

None of these
one species of a pair benefits
both the species of a pair benefit
one species of a pair is more benefited

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Microbiology of Soils
The crops which are involved in nitrogen fixation are

alfalfa and clover
soybean
bean and lupine
all of these

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Microbiology of Soils
The nonsymbiotic bacteria which fix nitrogen live in the soil independently are

Clostridium
considerably less important in comparison to the symbiotic bacteria
All of these
Azotobacter

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Microbiology of Soils
In the process of nitrogen fixation, which of the following microorganism is involved?

Non symbiotic microorganisms only
None of these
Symbiotic microorganisms only
Non symbiotic and symbiotic microorganisms only

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Microbiology of Soils
Which of the following species of different genera of bacteria are not capable of transforming nitrate to nitrogen?

Agrobacterium
None of these
Alcaligenes
Achromobacter

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