Mitochondria in Algae are Thought to Have Arisen from Which

Question

Mitochondria in algae are thought to have arisen from which source?
A) Algae don't have mitochondria.
B) aerobic bacteria
C) cyanobacteria
D) anaerobic bacteria
E) photosynthetic viruses

Accepted Answer

Mitochondria are thought to have originated from endosymbiosis of aerobic bacteria, as they have their own circular DNA and replicate independently from the cell. This theory also applies to algae, which are eukaryotic organisms and therefore have mitochondria.