Eubacteria Kingdom
The larger of the two kingdoms of prokaryotes is the eubacteria. Eubacteria include a wide range of organisms with different lifestyles. The variety is so great, in fact, that biologists do not agree on exactly how many phyla are needed to classify this group. Eubacteria live almost everywhere. They live in fresh water, salt water, on land, and on and within the human body. The figure below shows a diagram of Escherichia coli, a typical eubacterium that lives in human intestines.
A Typical Eubacterium A bacterium such as E. coli has the basic structure typical of most prokaryotes: cell wall, cell membrane, and cytoplasm. Some prokaryotes have flagella that they use for movement. The pili are involved in cell-to-cell contact. The cell walls of eubacteria contain peptidoglycan.
Eubacteria are usually surrounded by a cell wall that protects the cell from injury and determines its shape. The cell walls of eubacteria contain peptidoglycan, a carbohydrate. Inside the cell wall is a cell membrane that surrounds the cytoplasm. Some eubacteria have a second membrane, outside the cell membrane, that makes them especially resistant to damage.
A Typical Eubacterium A bacterium such as E. coli has the basic structure typical of most prokaryotes: cell wall, cell membrane, and cytoplasm. Some prokaryotes have flagella that they use for movement. The pili are involved in cell-to-cell contact. The cell walls of eubacteria contain peptidoglycan.
Eubacteria are usually surrounded by a cell wall that protects the cell from injury and determines its shape. The cell walls of eubacteria contain peptidoglycan, a carbohydrate. Inside the cell wall is a cell membrane that surrounds the cytoplasm. Some eubacteria have a second membrane, outside the cell membrane, that makes them especially resistant to damage.