eukaryote


eukaryote

Any organism composed of one or more cells, each of which contains a clearly defined nucleus enclosed by a membrane, along with organelles (small, self-contained, cellular parts that perform specific functions). The organelles include mitochondria, chloroplasts, a Golgi apparatus, an endoplasmic reticulum, and lysosomes. All organisms except bacteria and archaea are eukaryotes; bacteria and archaea are prokaryotes.

This entry comes from Encyclopædia Britannica Concise.
For the full entry on eukaryote, visit Britannica.com.

Seen & Heard

What made you look up eukaryote? Please tell us what you were reading, watching or discussing that led you here.