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(HELP PLEASE) Which of the following best supports the endosymbiont theory that present-day eukaryotic cells are descendants of a successful symbiotic relationship between a host cell and an engulfed prokaryote? A.) Chloroplasts and mitochondria replicate in a similar manner as some prokaryotes. B.) Chloroplasts are necessary for photosynthesis reactions in plant and bacteria cells. C.) Mitochondria and chloroplasts are able to produce ATP molecules to be used by the cell. D.) Mitochondria use proteins and nutrients produced in other regions of the eukaryotic cell.

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