What other organisms besides plants and animals make up of cells?

Besides plants and animals, other organisms that are made up of cells include fungi, which consist of complex cellular structures, and protists, a diverse group of mostly unicellular organisms. Bacteria and archaea also comprise cells, but they are prokaryotic, meaning their cells lack a defined nucleus. Additionally, viruses, while not considered living organisms in the traditional sense, are composed of genetic material enclosed in a protein coat and can infect living cells.