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eukaryote |
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eukaryote /eu·kary·ote/ (u-kar´e-ōt) an organism whose cells have a true nucleus bounded by a nuclear membrane within which lie the chromosomes; eukaryotic cells also contain many membrane-bound organelles in which cellular functions are performed. The cells of higher plants and animals, fungi, protozoa, and most algae are eukaryotic. Cf. prokaryote.
eukaryote [yo̅o̅ker′ē·ot] Etymology: Gk, eu + karyon, nut an organism whose cells contain a true nucleus. All organisms except bacteria are eukaryotes. Also spelled eucaryote. Meucaryotic, eukaryotic, adj. eukaryote an organism of the Eucaryotae, whose cells have a true nucleus bounded by a nuclear membrane and containing the chromosomes and which divide by mitosis. Eukaryotic cells also contain membrane-bound organelles, such as mitochondria, chloroplasts, lysosomes and the Golgi apparatus. Plants and animals, protozoa, fungi and algae (except blue-green algae) are eukaryotes. Other organisms (the bacteria) are prokaryotes. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Neither bacteria nor eucarya (plants, animals, fungi, and any other organisms with a nucleus in their cells), archaea represent a third branch of life, many scientists contend. Until recently, biologists had divided the so-called tree of life into two main branches, the Bacteria (or Prokaryotes), and the Eucarya (or Eukaryotes). |
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