View Pit Stop page for race #232 by krazedkat — Ghost race
View profile for keith (krazedkat)
Official speed | 76.56 wpm (105.96 seconds elapsed during race) |
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Race Start | June 13, 2020 5:24:36am UTC |
Race Finish | June 13, 2020 5:26:22am UTC |
Outcome | Win (1 of 2) |
Accuracy | 95.0% |
Points | 127.60 |
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. |