To access all linked contents, download the entire book Cells are the basic units of living organisms, with the exception of viruses whose structure and function are different from cells. Schematic drawings of a nerve cell and a red blood cell. The prokaryotic cell does not have a nucleus. The eukaryotic cell contains a nucleus.
Eukaryotes are the organisms made up of eukaryotic cells.
They include protista, fungi, animals and plants. Prokaryotes include archaebacteria and eubacteria . They are single-cell organisms. Archaea live in extreme environments . They produce methane and cannot tolerate exposure to oxygen.