Lipscomb, Diana L. George Washington University, Washington, DC.
Corliss, John O. Formerly, Department of Zoology, University of Maryland, College Park, Maryland.
- Additional Readings
The vast array of living and fossil organisms with complex cells in which the genetic material is organized into chromosomes (linear pieces of DNA bound with histone proteins and visible as compact structures during mitosis and meiosis) and contained within a membrane-bound nucleus. The Eukaryotae have a common origin from organisms with prokaryotic cells (bacteria and archaea) that do not have their DNA in chromosomes and lack membrane-bound organelles. The Eukaryotae thus include all multicellular plants, fungi, and animals, as well as a collection of the unicellular protists. See also: Cell nucleus; Chromosome
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