Mitochondria are essentially the same in all eukaryotes, including plants, animals, and fungi. Based on this observation, how were
mitochondria most likely acquired?
Choose one:
A. by an ancestral eukaryotic cell and then replaced by chloroplasts in the line that led to plant cells
B. by a prokaryotic cell approximately 1000 years ago
C. by an ancestral prokaryote and then lost in the line that led to archaea
D. by an ancestral eukaryotic cell before the lines that led to animal cells, plant cells, and fungi diverged
E. from a free-living, photosynthetic bacterium
