This they effected, he was of opinion, through the agency of micro-organisms.
These are due to the formation of gas by the micro-organisms in the cheese.
These tiny organisms are called germs, microbes, or micro-organisms.
In some cases no micro-organisms can be detected even by culture methods.
They will feed on minute crustaceans and other micro-organisms.
The egg of the bird is perfectly free from micro-organisms when it is laid.
They are known as micro-organisms, of which the bacteria are the most important.
They were unable to venture into his old one because of the radioactivity and micro-organisms.
Through fever the organism is freed from micro-organisms which may have forced their way in.
So that there could be micro-organisms on the new planet which could be harmful.