The Endosymbiotic Theory Says That Precursor Eukaryotic Cells Acquired Flagella

Multiple Choice

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.