NEET BIOLOGY

Detailed explanation-1: -Archaebacteria are a group of microorganisms considered to be an ancient form of life that evolved separately from the bacteria and blue-green algae, and they are sometimes classified as a kingdom.

Detailed explanation-2: -They were given the name ‘ancient living fossils’ because they stand for one of the first forms of life that first experimented with absorbing solar energy, survived in anaerobic environments, and developed strategies to oxidize compounds found in the substratum in the presence of oxygen.

Detailed explanation-3: -The archaeal lineage may be the most ancient that exists on earth. Within prokaryotes, archaeal cell structure is most similar to that of gram-positive bacteria, largely because both have a single lipid bilayer and usually contain a thick sacculus of varying chemical composition.

Detailed explanation-4: -Archaebacteria are found in very harsh conditions such as in the volcanic vents or at the bottom of the sea. They are often called “extremophiles". They can easily survive in such extreme environment as sea vents releasing sulfide-rich gases, hot springs, or boiling mud around volcanoes.