What is archaebacteria?

Answer 1

an archaebacteria is the classification name of bacteri that have no nucleus and are also found in places whare normal bacteria are not found

Answer 2

Archaebacteria


(är´´kēbăktĭr´ē) , diverse group of bacteria (prokaryotes), sometimes called the archaea and considered a major group unto themselves. Archaebacteria are contrasted with the Eubacteria, from which they differ biochemically in the arrangement of the bases in their ribosomal RNA and in the composition of their plasma membranes and cell walls. There are three major known groups of Archaebacteria: methanogens, halophiles, and thermophiles. The methanogens are anaerobic bacteria that produce methane. They are found in sewage treatment plants, bogs, and the intestinal tracts of ruminants. Ancient methanogens are the source of natural gas. Halophiles are bacteria that thrive in high salt concentrations such as those found in salt lakes or pools of sea water. Thermophiles are the heat-loving bacteria found near hydrothermal vents and hot springs. Many thermophiles are chemosynthetic (see chemosynthesis), using dissolved sulfur or other elements as their energy source and iron as a means of respiration. Archaebacteria emerged at least 3.5 billion years ago and live in environments that resemble conditions existing when the earth was young.

Answer 3

Archaebacteria. Another Greek scientific word ΑΡΧΑΙΟ means ancient bacterium

Answer 4

THE ARCHAEBACTERIA ARE A GROUP OF BACTERIA THAT LIVE IN UNUSUALLY HARSH ENVIRONMENTS.

2. Scientists treat Archaebacteria as a separate Kingdom because these organisms are So Different from other bacteria.

3. Archaebacteria are CHEMICALLY DISTINCT from other BACTERIA in several ways:

A. The Cell Walls, Cell Membranes, and Ribosomal RNA are different from those of other BACTERIA. The Absence of PEPTIDOGLYCAN, a protein-carbohydrate found in the cell walls of Eubacteria.

B. They can live where no other organism can survive. They live in extreme environments, such as acidic hot springs, near undersea volcanic vents, and highly salty water.

4. The PREFIX "ARCHEA" means ANCIENT. They are considered ancient because they probably resemble the FIRST FORMS of LIFE on Earth.

5. Scientist think that the harsh environments in which Archaebacteria now live are like conditions on the Earth when life first appeared and began to evolve.

6. Archaebacteria can be divided into THREE Groups, based on the Environment in which they live:

A. METHANOGENS - Live in oxygen-free environments (anaerobic conditions) and produce Methane Gas. They are named for their unique method of harvesting Energy by converting H2 and CO2 into Methane Gas. Because Oxygen is a Poison To Them, Methanogens can Live Only in ANAEROBIC Conditions, such as the Bottom of Swamps and in Sewage. The methane produced by methanogens living in the waters of SWAMPS, SEWAGE, or MARSHES is called SWAMP GAS. Methane produced in the DIGESTIVE TRACTS of many animals including humans is called INTESTINAL GAS. In the digestive track of cows they break down CELLULOSE, enabling cows to use nutrients in grass and plants. They are used in INDUSTRY to treat SEWAGE and to help PURIFY WATER.

B. THERMOACIDOPHILES - Can live in Water that is Extremely HOT (230 degrees F.) and ACIDIC (pH less than 2), two conditions that would kill other organisms. Can be found around HOT SPRINGS like those at Yellowstone National Park, No other organism can live in these waters! Thermoacidophiles live near volcanic vents on land or near hydrothermal vents, cracks in the ocean floor miles below the surface that leak scalding acidic water.

C. EXTREME HALOPHILES - Live in Extremely SALTY Conditions. Found in the Great Salt Lake in Utah and the Dead Sea. Can grow in water that is up to ten times saltier than seawater. High salt concentrations would kill most bacteria, but this high concentration is beneficial to the growth of Extreme Halophiles, and these organisms use Salt to Generate ATP.

Hope this helps!!!

Answer 5

considered ancient life forms that evolved separately from bacteria and blue-green algae

Answer 6

the oldest living organisms,old bacterias

Answer 7

What Is Archebacteria