The endosymbiotic theory process consists of two phases. From the list provided, select the two phases.

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The endosymbiotic theory suggests that certain organelles, particularly mitochondria and chloroplasts, were once free-living bacteria that were engulfed by a host cell. The two phases of this theory involve internal modifications leading to the formation of the nucleus (A) and the formation of internal membranes (C), which facilitated the integration and functionality of the engulfed bacteria within the host cell.

The Endosymbiotic Theory Process Consists of Two Phases