What implication does the presence of circular DNA in mitochondria have for the endosymbiotic theory?

• A. It indicates that mitochondria can function independently of the cell.
• B. It proves that mitochondria are capable of photosynthesis.
• C. It supports the idea that mitochondria originated from a prokaryotic ancestor.
• D. It suggests that mitochondria evolved from a eukaryotic ancestor.

Answer: (C)