Some excavates are autotrophic; how did Euglena acquire the ability to photosynthesize?

Some excavates are autotrophic; how did Euglena acquire the ability to photosynthesize?

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Some excavates are autotrophic; how did Euglena acquire the ability to photosynthesize?


A) This group acquired plastids by endosymbiosis of another photosynthetic organism
B) This group evolved a photosynthetic organelle indepenedently


Answer: A


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