Growth and Nutrition of Bacteria
A synergistic effect is observed when

one organism produces a growth factor utilized by another
microbial alteration of pH, aw, Eh favours the growth of another
All of these
one organism removes an inhibitory substance for another

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Growth and Nutrition of Bacteria
Which of the following organisms typically get their carbon for biosynthesis from organic compounds?

Ammonia-oxidizing bacteria (chemolithotrophic bacteria)
Photosynthetic cyanobacteria (phototrophic metabolism)
Aerobic, glucose-respiring bacteria (aerobic respiration)
None of these

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