Cell Biology
Eukaryote
Organisms whose cells contain a membrane-bound nucleus and other membrane-bound organelles. Includes all plants, animals, fungi, and protists.
Biological Context
Eukaryotic cells arose when prokaryotes engulfed other prokaryotes that became mitochondria and chloroplasts (endosymbiosis). This allowed larger, more complex cells and eventually multicellular life. The compartmentalization of eukaryotic cells enables complex biochemistry impossible in prokaryotes.