How are organisms in the bacteria and archaea domains similar apex?

The correct answer is that, regardless of the separation, Members of bacteria and archaea nonetheless have many similarities. The maximum substantial similarity is that they are considered to be prokaryotes, which means they are single-celled organisms that don't have a nucleus or another membrane-bound organelles. This separates them apart from members of eukarya or eukaryotes.

Bacteria and Archea are two domains of life (Eukarya is the third) which share some characteristics. Both are microorganisms with almost the same shape, size, and appearance. They also share the structure of the cell-prokaryotic cell. This means that Archea and Bacteria are single-celled organisms that do not have a nucleus or membrane-bound organelles. Reproduction of both domains is performed by asexual reproduction with the process of binary fission, budding or fragmentation. Sometimes habitat of Archea and Bacteria is the same, like those in hot springs.