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.
Game | Time | WPM | Accuracy |
---|---|---|---|
48256 | 2020-09-23 00:28:17 | 99.31 | 99% |
47563 | 2020-09-20 18:16:35 | 107.64 | 98% |
47562 | 2020-09-20 18:15:13 | 111.80 | 99% |
47561 | 2020-09-20 18:13:55 | 106.11 | 99% |
47560 | 2020-09-20 18:12:31 | 112.22 | 99% |
47559 | 2020-09-20 18:11:12 | 100.47 | 98% |
38244 | 2018-12-12 22:28:56 | 100.34 | 99% |
38135 | 2018-02-27 20:56:28 | 89.83 | 98% |