Archaea differ from bacteria in that archaea Archaea differ from bacteria in that archaea lack nuclei. are prokaryotic. use organic compounds for food. have cell walls composed of substances other than peptidoglycan. reproduce by binary fission.

have cell walls composed of substances other than peptidoglycan

Explanation:

Archaea are single celled microbes with the absence of cell nucleus and cell membrane-bound organelles just like bacteria. Archaea and bacteria both reproduce by binary fission. As it relates to their gene structure, they both have a circular chromosome.

Compared to bacteria, archaea lack peptidoglycan in their cell wall, but contain psuedo-peptidoglycan that is similar to peptidoglycan in physical structure and function, but not in chemical structure.