human
Can you explain the difference between a bacterium and an eukaryote?
assistant
A bacterium is a single-celled organism that can be either prokaryotic or eukaryotic. Prokaryotes are much simpler than eukaryotes, as they lack a nucleus and other organelles. Eukaryotes have more complex structures, such as a nucleus with DNA inside of it. Bacteria typically reproduce by binary fission, while eukaryotes often use mitosis to divide their cells.