Mitochondria and chloroplasts are thought to have evolved from free-living aerobic bacteria that were engulfed by an ancestral anaerobic cell and established a mutually beneficial (symbiotic) relationship with it. Which of the following statements is NOT true about these organelles? a. They are similar in size to small bacteria. b. They have their own circular genomic DNA. c. They have their own ribosomes. d. They have their own transfer RNAS. e. They are found in all eukaryotes.