Saturday, January 4, 2020

What are Archaebacteria?

Archaebacteria are primitive bacteria that often live in extreme environments. This domain includes the following: 
1) Thermophiles (“heat lovers”; see below for more about thermophiles), which live in very hot environments, including the hot sulfur springs of Yellowstone National Park,which reach temperatures ranging from 140 to 176°F (60–80°C). 
2)Halophiles (“salt lovers”), which live in locations with high concentrations of salinity, such as the Great Salt Lake in Utah (with salinity levels from 15 to 20 percent; seawater normally has a level of salinity of 3 percent); and 
3)Methanogens that get their energy by using hydrogen gas (H2) to reduce carbon dioxide (CO2) to methane gas (CH4).
Fig: Halobacteria (shown here) are an example of Archaebacteria, a primitive form of bacteria that can surviveextreme environments.

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