EVERYDAY SCIENCE

Detailed explanation-1: -Archaea are microorganisms that define the limits of life on Earth. They were originally discovered and described in extreme environments, such as hydrothermal vents and terrestrial hot springs. They were also found in a diverse range of highly saline, acidic, and anaerobic environments.

Detailed explanation-2: -The domain Archaea corresponds to the kingdom Archaebacteria. Members of the domain Archaea are unicellular and prokaryotic, and they live in some extreme environments-in volcanic hot springs, brine pools, and black organic mud totally devoid of oxygen.

Detailed explanation-3: -Archaebacteria are found in extreme environments such as hot boiling water and thermal vents under conditions with no oxygen or highly acid environments. Finding Archaebacteria: The hot springs of Yellowstone National Park, USA, were among the first places Archaebacteria were discovered.

Detailed explanation-4: -Archaeans may be the only organisms that can live in extreme habitats such as thermal vents or hypersaline water. They may be extremely abundant in environments that are hostile to all other life forms.

Detailed explanation-5: -Archaebacteria are known to be the oldest living organisms on earth. They belong to the kingdom Monera and are classified as bacteria because they resemble bacteria when observed under a microscope.