what-does-the-endosymbiotic-theory-propose-about-the-origin-of-mitochondria-and-

Question

What does the endosymbiotic theory propose about the origin of mitochondria and chloroplasts?

Accepted Answer

They originated from engulfed aerobic and photosynthetic bacteria, respectively.

Answer

They are remnants of ancient viruses.

Answer

They were formed from the fusion of multiple eukaryotic cells.

Answer

They evolved independently within eukaryotic cells.