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.
—from Campbell Biology AP Edition, a book by Campbell
Active since October 7, 2017.
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| Rank | Username | WPM | Accuracy | Date |
|---|---|---|---|---|
| 1722. | victor (victor4132) | 66.34 | 96% | 2020-03-25 |
| 1723. | Sriniketh (srinikethamv) | 66.30 | 97% | 2018-01-08 |
| 1724. | Kameloc (twoddle2) | 66.23 | 97% | 2020-12-11 |
| 1725. | Filip (jyunero) | 66.22 | 97% | 2020-04-11 |
| 1726. | K3VIN (bootunstoppable) | 66.19 | 95% | 2018-06-02 |
| 1727. | Miguel (miguelmint) | 66.13 | 94% | 2018-03-22 |
| 1728. | A (gdup) | 66.13 | 96% | 2020-03-29 |
| 1729. | Steven (sp1cez) | 66.13 | 96% | 2019-12-06 |
| 1730. | dexz (dexor) | 66.09 | 97% | 2020-05-02 |
| 1731. | tan (tnttant) | 66.08 | 95% | 2020-11-28 |
| 1732. | Tahsin (mrtek) | 66.03 | 93% | 2018-07-03 |
| 1733. | rasith (rasithw) | 65.98 | 96% | 2020-11-19 |
| 1734. | duong (anhhungcolao) | 65.97 | 96% | 2020-12-20 |
| 1735. | Afthershock (afthershock) | 65.95 | 94% | 2018-04-27 |
| 1736. | Timothy (noma624) | 65.94 | 95% | 2020-09-22 |
| 1737. | Ray (mray) | 65.88 | 95% | 2018-02-17 |
| 1738. | JanBa (pythonbyte) | 65.85 | 95% | 2020-08-07 |
| 1739. | James (experiential) | 65.78 | 98% | 2017-12-08 |
| 1740. | Micky (vorine) | 65.73 | 94% | 2019-08-11 |
| 1741. | Abhishek Rawat (abhishek3007) | 65.72 | 97% | 2018-09-24 |
| 1742. | Herlian (herlianzhang) | 65.69 | 96% | 2018-09-22 |
| 1743. | Manuel Maria (brair) | 65.63 | 98% | 2018-11-18 |
| 1744. | Qi (whathaha) | 65.63 | 95% | 2020-07-23 |
| 1745. | Jebediah (jebediah144) | 65.56 | 98% | 2018-11-28 |
| 1746. | Nixon (nixon_the_cat) | 65.51 | 97% | 2019-06-17 |
| 1747. | Usman (usm7861) | 65.49 | 98% | 2018-03-29 |
| 1748. | (shaun022) | 65.47 | 95% | 2020-05-24 |
| 1749. | Ryan (rinselmann) | 65.46 | 96% | 2018-09-25 |
| 1750. | Borislav Nonquit (borislav) | 65.42 | 95% | 2018-01-05 |
| 1751. | jacktheboy211 (jacktheboy211) | 65.41 | 93% | 2020-07-27 |
| Universe | Races | Average WPM | First Race |
|---|---|---|---|
| Default (English) | 2,929 | 89.24 | October 7, 2017 |
| Instant Death Mode | 3 | 99.10 | January 10, 2019 |
| New English Texts | 1 | 108.31 | May 26, 2022 |
| All TypeRacer Texts | 1 | 76.47 | February 24, 2022 |