Chloroplasts and mitochondria have relatively small circular chromosomes which supports the endosymbiotic theory that they arose from which of the following?

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Chloroplasts and mitochondria have small circular chromosomes that resemble those found in bacteria. This supports the theory that they were originally free-living bacterial cells that were engulfed by larger eukaryotic cells and formed a symbiotic relationship, eventually evolving into organelles.

Chloroplasts and Mitochondria Have Relatively Small Circular Chromosomes Which Supports