Eubacteria are single-celled organisms capable of obtaining nutrition by using organic carbon, photosynthesis and chemosynthesis. Eubacteria may be categorized based on how they obtain nutrients.
Eubacteria may display both heterotrophic and autotrophic characteristics. Heterotrophic organisms obtain their nutrients through absorbing carbon from their food sources and comprise a vast majority of all living organisms. Autotrophic organisms obtain food through a process known as photosynthesis, in which sunlight is utilized and converted into an energy source.
There are four main categories of eubacteria, which are based on their food sources. Photoautotrophs obtain their nutrients through sunlight and absorb carbon from the air. Chemoautotrophs use inorganic chemicals as an energy source and also absorb carbon from the air. Photoheterotrophs use sunlight while obtaining carbon from organic materials. Chemoheterotrophs obtain carbon in the same manner as photoheterotrophs, while their energy source is organic chemicals.
Eubacteria are resistant to many external influences and may survive for up to 50 years without nutrients. Eubacteria are essential to any ecosystem, as they are responsible for a large amount of the decomposition of organic and inorganic substances. They commonly act in a symbiotic manner with other forms of life, resulting in a balanced and beneficial association between the two organisms.