The 'Endosymbiotic Theory' suggests that which two organelles evolved from formerly free-living prokaryotes?
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Correct answer: Mitochondria and Chloroplasts
Mitochondria and chloroplasts possess their own circular DNA, double membranes, and 70S ribosomes, similar to bacteria. These characteristics support the theory that they originated as symbiotic prokaryotes engulfed by ancestral eukaryotic cells.
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