View Pit Stop page for race #278 by johnrik — Ghost race
View profile for João (johnrik)
Official speed | 77.68 wpm (104.43 seconds elapsed during race) |
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Race Start | February 15, 2018 12:17:40am UTC |
Race Finish | February 15, 2018 12:19:25am UTC |
Outcome | No win (3 of 4) |
Accuracy | 97.0% |
Points | 129.46 |
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. |