Question

Which of the following is not a piece of molecular evidence supporting the endosymbiotic theory? A. The mitochondria and chloroplasts are much different in structure than bacteria. B. Ribosomes of some organelles are like that of those found in bacteria. C. Some organelles divide by fission just like bacteria. D. Mitochondrial and chloroplast DNA is similar to bacterial DNA.

Answer 1

A, the endosymbiotic theory tells us that a looooong time ago, when there were only one-cell organisms, they kind of took in a bacteria. They profited from having a bacteria in it ( and I believe it is believed that this made it possible for organisms to have multiple cells, not sure) and these bacteria became mitonchondria/chloroplasts, thus answer A is the only one that doesn't support this theory.