Answer:
Bacteria
Explanation:
Bacteria contain all their DNA in a single circular chromosome. Bacteria also contain other smaller circular DNA molecules called plasmids, which can be obtained from other bacteria -through a process called conjugation- or from the environment.
Bacterial genomes are smaller than eukaryotic genomes, and unlike eukaryotes, most of the bacterial genome is coding. In most species of bacteria there is no non-coding regions between exons.
