Obligatelyoxidative: Obligate aerobes Exp.Rhodotorula
Facultativelyfermentative: Energy can be obtained by oxidative and fermentative processed such fungi are likely to be faculativeanaerobes. Oxidative metabolism, provides much more energy than fermentative, so higher yields can occur under aerobic conditions. Exp.Mucor, Saccharomyces
Obiligatelyfermentative:Oxygen is not needed for energy production , may be either harmless or toxic. Exp.Blastocladia, Neocallimastix