This is a domain of prokaryotic cells possessing diacyl glycerol diester lipids in their membranes, bacterial rRNA, no nuclear membrane, and are traditionally classified as bacteria.

The domain to which the statement refers is the Bacteria domain.

Explanation:

According to taxonomy there are three domains to classify living organisms, according to their cellular characteristics: Bacteria, Archaea and Eukarya, corresponding to the three main branches of the tree of life

The Bacteria domain encompasses prokaryotic unicellular organisms that lack most of the organelles, endomembrane systems or true nucleus -without nuclear membrane- so their genetic material is dispersed in the cytoplasm.

The only organelle bacteria present is the ribosome, so it is possible to find ribosomal RNA in them. Microorganisms such as bacteria belong to this domain.

Learn more:

Bacteria and Archaea domains link