In the classification of organisms by kingdom, all prokaryotes are grouped together in the kingdom Monera. Genetic research, however, led to the separation of prokaryotes into two domains, Archaea and Eubacteria. Which of the following best describes similarities between Archaea and Eubacteria?

Both can undergo binary fission and are autotrophs.
Both are able to withstand extreme temperatures and lack of oxygen.
Both have single-stranded, helical DNA and cell walls.
Both lack membrane-bound organelles and are single-celled.

D. Both lack membrane-bound organelles and are single-celled.

Explanation:

All prokaryotes are classified in two domains Archaea and Eubacteria as they differ in some characteristics. But as they both are prokaryotes there is some similarities between Archaea and Eubacteria that is they both are single celled and lack membrane-bound organelles.

They both reproduce asexually by binary fission but both are autotrophic and heterotrophic. They both are unable to survive in lack of oxygen. They both have circular DNA and not helical DNA.

Hence, the correct option is D.

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