Q: What evidence is there about the endosymbiotic theory

Flexi Says: Two pieces of evidence for endosymbiotic theory - (1) Mitochondria and chloroplasts contain DNA that is different from the DNA found in the cell nucleus. Instead, it is similar to the circular DNA of bacteria. (2) Mitochondria and chloroplasts are surrounded by their own plasma membranes, which are similar to bacterial membranes.