BIOMOLECULES AND ENZYMES

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: -They live in the anoxic muds of marshes and at the bottom of the ocean, and even thrive in petroleum deposits deep underground. Some archaeans can survive the dessicating effects of extremely saline waters. One salt-loving group of archaea includes Halobacterium, a well-studied archaean.

Detailed explanation-3: -Archaebacteria belong to the kingdom Archaebacteria and the domain Archaea and are distinct life forms separate from the domains Eukarya (includes plants, fungi, animals, and protists) and Bacteria.

Detailed explanation-4: -These organisms are today classified in the kingdom, Archaebacteria. Archaebacteria are found in extreme environments such as hot boiling water and thermal vents under conditions with no oxygen or highly acid environments.

Detailed explanation-5: -Archaea and bacterial cells lack organelles or other internal membrane-bound structures. Therefore, unlike eukaryotes, archaea and bacteria do not have a nucleus separating their genetic material from the rest of the cell.