Microbiology of Soils
Which of the following statement is not true about composition of biogas?

It also contains with traces of H2S, N2, H2and CO
Both (a) and (b)
It also contains with traces of O2 and Cl2
It is composed almost exclusively of methane and carbon dioxide

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Microbiology of Soils
Syntrophism involves

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

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