human
Can you explain the difference between a bacterium and an eukaryote?
assistant
Bacteria are single-celled organisms that lack a nucleus. Eukaryotes are multicellular organisms with nuclei, including plants, animals, fungi, and protists. The main differences between bacteria and eukaryotes include the presence of a cell membrane in eukaryotes and the absence of one in bacteria; the structure of their DNA; and the way they reproduce. Bacteria typically reproduce by binary fission, while eukaryotes have more complex reproductive processes such as meiosis.