Check all of the following conditions that apply to the endosymbiotic hypothesis. Check All That Apply Endosymbiosis involves one organism living inside another. Endosymbiosis involves one organism living inside another. The mitochondria, chloroplasts, and hydrogenosomes are believed to have evolved this way. The mitochondria, chloroplasts, and hydrogenosomes are believed to have evolved this way. Chloroplasts are thought to have evolved from an aerobic bacterium that lost the ability to live independently. Chloroplasts are thought to have evolved from an aerobic bacterium that lost the ability to live independently. The similarity of mitochondrial DNA and ribosomes to bacterial DNA and ribosomes supports the endosymbiotic hypothesis. The similarity of mitochondrial DNA and ribosomes to bacterial DNA and ribosomes supports the endosymbiotic hypothesis. SSU rRNA analysis shows that mitochondria are closely related to cyanobacteria.