Multiple Choice
What is indicated by the fact that NOT all eukaryotic cells contain both mitochondria and chloroplasts?
A) Endosymbiosis did not occur at all.
B) Endosymbiosis occurred only in the evolution of mitochondria.
C) Endosymbiosis did not occur in stages.
D) Endosymbiosis occurred in stages.
Correct Answer:

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Correct Answer:
Verified
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