Which piece of evidence best supports the endosymbiotic theory of organelle evolution?
A. The inner membrane of a mitochondrion and chloroplast resembles a eukaryotic cell while the outer membrane resembles that of a bacterial cell.
B. The outer membrane of a mitochondrion and chloroplast resembles a eukaryotic cell while the inner membrane resembles that of a bacterial cell.
C. Mitochondria and chloroplasts are much larger than present day bacteria.
D. Both mitochondria and chloroplasts divide by mitosis.
Answer: B
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