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Environment › ViewRhizospheres affect microbial population and nutrient availability by:
A. Exerting physical pressure
B. Increasing pore space
C. Secreting nutritive metabolites and organic solvents
D. Changing soil structure
Bacteriology › View
Microaerophilic bacteria are those which require
A. 21% oxygen for growth
B. low levels of oxygen for growth (lesser than O2 present in atmosphere)
C. oxygen for activation of enzymes
D. none of the above