Tag: anoxic

Normal Microbial Flora of the Oral Cavity

The oral cavity is one of a complex, heterogeneous microbial habitat. Saliva contains microbial nutrients, but it is not an especially good growth medium because...

Purple Phototrophic Bacteria

These bacteria carry out an-oxygenic photosynthesis. Thus, unlike the cyanobacteria oxygen is not released by these groups. These bacteria are a morphologically diverse group and...