|Official speed||129.17 wpm (62.80 seconds elapsed during race)|
|Race Start||February 25, 2018 11:50:27pm UTC|
|Race Finish||February 25, 2018 11:51:30pm UTC|
|Outcome||Win (1 of 2)|
|Text||#3550368 (Length: 676 characters)
Mitochondria and chloroplasts display similarities with bacteria that led to the endosymbiont theory. This theory states that an early ancestor of eukaryotic cells engulfed an oxygen-using non-photosynthetic prokaryotic cell. Eventually, the engulfed cell formed a relationship with the host cell in which it was enclosed, becoming an endosymbiont, a cell living within another cell. Indeed, over the course of evolution, the host cell and its endosymbiont merged into a single organism, a eukaryotic cell with a mitochondrion. At least one of these cells may have then taken up a photosynthetic prokaryote, becoming the ancestor of eukaryotic cells that contain chloroplasts.