Final answer:
M. tuberculosis is a eubacterium, meaning it is part of the Domain Bacteria, which comprises bacterial prokaryotic cells. It is distinct from the Domain Archaea, with the two domains showing substantial differences in their genetic material and cellular structures. The correct option is a) Eubacterium
Step-by-step explanation:
M. tuberculosis is a eubacterium, not an archaeon bacterium. This means that it is classified within the Domain Bacteria, a group of bacterial prokaryotic cells.
Archaea are a separate domain of life that also consists of prokaryotic cells but differ significantly from bacteria in terms of their genetic sequences, biochemical pathways, and membrane composition.
The name Halobacterium is indeed an oxymoron because it is a member of the Archaea domain, not the Bacteria domain.
Methanogens, which are a type of archaea, do have structural differences from bacteria, particularly in their cell wall composition, which relates to their unique metabolic abilities, such as utilizing CO₂ to oxidize H₂.
Phylogenetic analyses have shown that Archaea and Eukarya share a closer evolutionary relationship with each other than either does with the Bacteria, leading to the hypothesis that eukaryotic cells might have originated from an endosymbiotic event between an archaeon and a bacterium. The correct option is a) Eubacterium