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Some organelles found in modern eukaryotic cells may be the result of a symbiotic relationship between ancient prokaryotes. Which organelles may have once been prokaryotes?

a.

mitochondria and endoplasmic reticulum

c.

mitochondria and ribosomes
b.

endoplasmic reticulum and vacuoles

d.

mitochondria and chloroplasts

1 Answer

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mitochondria and chloroplasts may have once been prokaryotes because of the Endosymbiosis theory.
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