Microbiology 9th Edition by Laura Black, Jacquelyn Black

تمرين 1

All of the following are true about soil microorganisms EXCEPT:
(a) They never affect or change the physical characteristics of their soil microenvironment.
(b) They are considered to be a part of the soil.
(c) All major microbial taxonomic groups can be found in soil (bacteria, fungi, algae, protists, viruses).
(d) Species of the genus Clostridium contain important hu man pathogens found in soil.
(e) They are important as decomposers in the carbon and nitrogen cycles.