What is the endosymbiotic theory and what evidence supports it?

What is the endosymbiotic theory and what evidence supports it?

• A. Mitochondria and chloroplasts originated as free-living bacteria; evidence includes their own circular DNA, ribosomes, and double membranes
• B. Mitochondria originated from a larger cell swallowing smaller ones
• C. Chloroplasts evolved from random gene transfer from the nucleus
• D. Organelle membranes are identical to the nucleus

Answer: (A)