NEET BIOLOGY

Detailed explanation-1: -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.

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. Many of these bacteria can survive only in the absence of oxygen.

Detailed explanation-3: -The three domains are the Archaea, the Bacteria, and the Eukarya. Prokaryotic organisms belong either to the domain Archaea or the domain Bacteria; organisms with eukaryotic cells belong to the domain Eukarya.

Detailed explanation-4: -Inhabitants of domain Archaea are more closely related to eukaryotic cells than they are to bacteria. Whereas both bacteria and archaea lack a nuclear envelope and membrane-bound organelles, archaea and eukaryotes have similarities beyond those seen between bacteria and eukaryotic cells.