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Why do only Eukaryotic cells have nucleuses?
Question Date: 2008-11-06
Answer 1:

Eukaryotic cells evolved as a composite of several different prokaryotic cells. Most of the major components of eukaryotic cells, including mitochondria, chloroplasts, and possibly even the nucleus, were once free-living bacteria. As a result, eukaryotic cells have a number of obvious components and structure that prokaryotes do not, simply because an eukaryotic cell is really a combination of several different entities.

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