3 concepts
Chromosomes and DNA Replication in the Archaea
Archaea usually have a single circular chromosome.
Shared Features of Bacteria and Archaea
Most of the metabolic pathways, which comprise the majority of an organism's genes, are common between Archaea and Bacteria.
Shared Features of Archaea and Eukaryotes
Archaea possess genes and several metabolic pathways that are more closely related to those of eukaryotes than prokaryotes.