A
eukaryote is an organism whose cells contain complex structures enclosed within
membranes. Eukaryotes may more formally be referred to as the taxon Eukarya or
Eukaryota. The defining membrane-bound structure that sets eukaryotic cells
apart from prokaryotic cells
is the nucleus, or nuclear envelope, within which
the genetic material is carried. The presence of a nucleus gives eukaryotes
their name. Most eukaryotic cells also contain other membrane-bound organelles
such as mitochondria, chloroplasts and the Golgi apparatus.
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