What group is characterized by having no nucleus and possessing peptidoglycan?

The group characterized by having no nucleus and possessing peptidoglycan is Bacteria. Bacteria are prokaryotic organisms, meaning they lack a true nucleus and other membrane-bound organelles. Their genetic material is typically found in a region known as the nucleoid, which is not enclosed by a membrane.

Peptidoglycan is a vital component of the bacterial cell wall, providing structural support and shape to the cell. This polymer is made up of sugar and amino acid chains that form a rigid structure around the cell membrane. The presence of peptidoglycan is a distinguishing feature of bacteria, differentiating them from eukaryotic cells, which often have cell walls made of cellulose (in plants) or chitin (in fungi), and from archaea, which do not typically have peptidoglycan in their cell walls.

Cyanobacteria, the only option among the choices that is a type of bacteria, still fall under the broader category of Bacteria and also possess peptidoglycan, but the question asks for the group in general, which is Bacteria. Euglena, on the other hand, is a eukaryotic organism that contains a nucleus and does not have pept