Other contributors have said "How do organisms produce thier own food?" is the same question as "How are microorganisms used to produce food?" If you believe that these are not asking the same thing and should be answered differently, click here
Microorganisms are used in the processing of many foods. Yeast is used in the fermentation process to produce ethanol (alcohol), lactobacillus bulgaricus is used in cheese making and also in the...
i think vegitarian chickin is made of quorn (a type of fungi) and Soy sauce production uses the mould Aspergillus oryzae.Tempeh production also uses a mould, Rhizopus oligosporus.