One theory suggests that mitochondria and chloroplasts began as free-living prokaryotes. It is believed that, millions of years ago, these free-living prokaryotes entered larger cells by endocytosis and, rather than being broken down, became working organelles. Which characteristics of mitochondria and chloroplasts provide evidence for this theory?
- A1, 2 and 3
- B1 and 2 only
- C1 and 3 only
- D2 and 3 only