Which characteristic distinguishes organisms in kingdom Archaebacteria from organisms in kingdom Eubacteria?

Question

A.
Most organisms in kingdom Archaebacteria live in extreme environments, while most organisms in kingdom Eubacteria live in moderate environments.

B.
Most organisms in kingdom Archaebacteria are single-celled, while only some organisms in kingdom Eubacteria are single-cell.

C.
Organisms in kingdom Archaebacteria are rod shaped, and organisms in kingdom Eubacteria are only cocci or spiral shaped.

D.
Organisms in kingdom Archaebacteria have circular DNA, and organisms in kingdom Eubacteria have linear DNA.

Answer 1

The characteristic that distinguishes organisms in kingdom Archaebacteria from organisms in kingdom Eubacteria is:

A. Most organisms in kingdom Archaebacteria live in extreme environments, while most organisms in kingdom Eubacteria live in moderate environments.

Archaebacteria are known for thriving in extreme conditions such as high temperatures, salinity, or acidity, whereas Eubacteria are more commonly found in standard environmental conditions.