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Domain BacteriaDomain BacteriaDomain BacteriaDomain Bacteria




Here's the kingdom of the Domain Bacteria!

Some of the characteristics of the kingdom Eubacteria are the living areas. Unlike their distant cousins, archaebacteria, they do not live in such extreme environments and have a larger diversity of the nutritional needs. Eubacteria are part of the biological division of prokaryotes because they have no membrane-bound organelles and are unicellular. There are three main divisions of eubacteria. All of which I will cover.
The first division are the hetereotrophic eubacteria. They live almost anywhere and use organic molecules as their main food source. Some are not able to create or trap organic molecules themselves, so they are parasitic and depend on other living organisms to make their food. Some can also be saprophytes and will feed on dead organisms or the waste of other organisms to obtain the molecules they need.
The second division of eubacteria are photosynthetic autotrophs. They also live on organic molecules but can make them on their own. The one key ingredient they need to make their food is sunlight. They depend on sunlight which is one of the key parts in making the organic molecules. One large group of this division is the cyanobacteria. What's really neat about these bacteria is that instead of being unicellular, they are really long chains of independent cells. They are an exception in the eubacteria classification.
The last division of eubacteria is the chemosynthetic autotrophs. They also are able to create their own organic molecules, but can do so without the sun. Instead they convert molecules into food by chemical reactions. Their method is called chemosynthesis, where they break inorganic molecules that contain sulfur and nitrogen. When they break down the molecules they release the energy inside of the molecules creating the chemical reaction. Some plants depend on this division of eubacteria because through their chemosynthesis they change nitrogen from the atmosphere into molecules that contain nitrogen which plants depend on to survive.

Two Examples of this Kingdom

This is a Anabaena


This is a Spiroplasma