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Eukaryotic cells are believed to have evolved from prokaryotic cells through a symbiosis between separate single-celled organisms.

According to the endosymbiotic theory,
Select Option mitochondriaGolgi bodieslysosomes
and plastids such as
Select Option ribosomeschloroplastsgranules
are organelles representing formerly free-living bacteria (prokaryotes) that were taken inside another cell as an endosymbiont around 1.5 billion years ago. These organelles carry DNA that is
Select Option the same asdifferent from
the remainder of the eukaryotic cell.
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