ABSTRACT
Fungi are osmoheterotrophic eukaryotes that play a key role in sustaining life on earth. Fungi are found in the Kingdom Mycetae and the Kingdom Straminipila. Fungal cell walls are made of chitin, chitosan or polysaccharides. They reproduce by spores produced asexually or sexually. In general, rRNA is highly conserved with the slow rate of evolutionary change. The taxonomy was originally based on morphological characters, but molecular techniques now in use have resulted in several changes in classification, and further changes are expected. Fungi are eukaryotic microorganisms with an osmoheterotrophic nutrition. Fungi have been conventionally classified based on an enormous amount of knowledge gathered through microscopic observations of structure and life cycle.
