The endosymbiotic theory says that precursor eukaryotic cells acquired flagella by endosymbiosis with a _____ ancestor, and others gained photosynthetic ability from endosymbiosis with a _____ ancestor.
A)protozoan, algae
B)archaea, cyanobacteria
C)spirochete, cyanobacteria
D)helminth, algae
E)None of the choices are correct.

Question

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The endosymbiotic theory suggests that eukaryotic cells acquired flagella through endosymbiosis with a spirochete ancestor and gained photosynthetic ability from endosymbiosis with a cyanobacteria ancestor.

The Endosymbiotic Theory Says That Precursor Eukaryotic Cells Acquired Flagella