Once rhizobia enter the plant cell through the infection thread they undergo rapid multiplication and differentiation into pleomorphic nitrogen fixing cells called _____ .
A)shizonts B)bacteroids C)elementary bodies D)reticulate forms E)nitromorphs
The most common inhabitants of the human skin are members of which phyla?
A)Proteobacteria and Bacteroidetes B)Proteobacteria and Firmicutes C)Bacteroidetes and Firmicutes D)Firmicutes and Actinobacteria E)Actinobacteria and Proteobacteria