What are mitochondria and how did we come to have them?
September 22, 2017 by Steven Zuryn, The Conversation
We've probably all heard of mitochondria, and we may even remember learning in school that they are the "powerhouses of the cell" – but what does that actually mean, and how did they evolve? To answer this question, we have to go back about two billion years to a time when none of the complexity of life as we see it today existed.
Where did mitochondria come from?
https://medicalxpress.com/news/2017-09-mitochondria.html