Which of the following explains why photosynthesis is widely but discontinuously distributed throughout the eukaryotic tree?
A) Photosynthesis was acquired early in evolution, but then lost.
B) Photosynthesis was acquired multiple times through endosymbiosis.
C) All eukaryotes are capable of photosynthesis, but it is repressed in some cases.
D) Some eukaryotes evolved photosynthetic pathways separate from chloroplasts.
Correct Answer:
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