concerns the vital life processes of microorganisms

Carbon, hydrogen, oxygen, nitrogen, phosphorus and sulfur are the 6 major chemical elements of living organisms

All organisms require a nutrients (essential), source of energy and..

Microbes representing 4 major nutritional catergories:

photoautotrophs, photoheterotrophs, chemoautotrophs, chemoheterotrophs

organisms that use light as an energy source

Organisms that use inorganic or organic chemicals as an energy source

Organisms that us Carbon Dioxide or carbon as source. ex plants, algae, cyanobacteria

Organisms use organic compounds as carbon source:ex. humans, animals, fungi, protozoa

Organisms the use both light source and Carbon Dioxide as carbon source; EXAMPLES plants algae and cyanobacteria

Organisms that use light and other organic compounds other than Carbon Dioxide: EX purple and green nonsulphur bacteria

Uses chemicals as energy source and carbon dioxide as aa carbon source: ex. Nitrigying, hydrogen, iron and sulfur bacteria

uses chemical as energy source and organic compounds other than Carbon Dioxide as carbon souce.: ex animals, protoaoz, fungi, bacteria