20 May


Fungi are heterotrophic eukaryotic organisms that produce exoenzymes and absorb their nutrients.  Fungi may be saprophytic or parasitic and can be unicellular or filamentous.  The features that separate fungi from other organisms are: eukaryotic, heterotrophic, lack tissue differentiation, have cell walls of chitin or other polysaccharides and propagate by spores.  Organisms such as water molds, mushrooms, puffballs, yeasts, and molds.  These organisms do not have a consistent genetic background and are thought to have evolved from two different ancestral lines.  Traditional methods of classification rely on morphological characteristics however more modern techniques use genetic analysis to classify fungi.  Data collected relatively rececently from genetic analysis suggests that classification based on morphology does not reflect evolutionary relationships. pauln