Mycoplasma is a:

Chlorobium vesicle is present in

Rhizobia are . . . . . . shaped.

Which are the most primitive types of organisms?

In the bacterium $Bacillus$ $subtilis$,the cells often become attached from end to end forming long filamentous chains,which are embedded in a mass of mucilage forming a scum layer on the substratum. This is called:

Organisms called methanogens are most abundant in a