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 |
|---|---|---|---|---|
| 800. | I (excelsiate) | 85.38 | 98% | 2018-01-06 |
| 801. | Daniaal (bigchungus_) | 85.37 | 96% | 2020-09-29 |
| 802. | imako (imako) | 85.35 | 97% | 2018-06-28 |
| 803. | Austin (ajrocks99) | 85.35 | 97% | 2020-10-31 |
| 804. | Night (jiddery) | 85.34 | 99% | 2019-12-09 |
| 805. | One last time (ubershah) | 85.32 | 97% | 2018-11-25 |
| 806. | da (causenetsofv) | 85.29 | 99% | 2020-11-07 |
| 807. | David (yeweon) | 85.27 | 96% | 2017-10-14 |
| 808. | Rachael (rachael66) | 85.25 | 98% | 2019-08-12 |
| 809. | will (wpham34) | 85.22 | 97% | 2018-06-01 |
| 810. | Lee (lee_randomly) | 85.21 | 96% | 2020-09-07 |
| 811. | Oliver (torto21) | 85.18 | 98% | 2019-10-11 |
| 812. | THeasdf5 (typehans) | 85.18 | 98% | 2018-02-20 |
| 813. | Sam (numberonemega) | 85.17 | 96% | 2018-09-09 |
| 814. | Dan (dandarandan) | 85.15 | 96% | 2019-02-03 |
| 815. | no (jonah1357) | 85.14 | 95% | 2020-12-07 |
| 816. | jack (jackracer23) | 85.11 | 98% | 2019-07-08 |
| 817. | Tommy (tommyn123) | 85.09 | 98% | 2018-10-06 |
| 818. | help (shung3) | 85.09 | 97% | 2020-08-25 |
| 819. | (maybenonquit) | 85.07 | 97% | 2020-04-12 |
| 820. | dalineth (dalineth) | 85.06 | 97% | 2019-03-23 |
| 821. | tannoobkod (tannoobkodz) | 85.03 | 97% | 2018-10-05 |
| 822. | Pacific Monk (pacificmonk) | 85.03 | 98% | 2018-04-18 |
| 823. | Prasannjeet (misteeque) | 85.01 | 97% | 2018-09-14 |
| 824. | Frank (frankxu) | 85.01 | 97% | 2018-12-23 |
| 825. | Ye (yexiaojun) | 84.99 | 97% | 2019-07-13 |
| 826. | anyou (asianguy2816) | 84.99 | 96% | 2020-11-16 |
| 827. | Jake (mageyoulook) | 84.98 | 97% | 2019-04-22 |
| 828. | Daggerpov (read_my_name) | 84.98 | 98% | 2019-09-25 |
| 829. | Derek (derekconner26) | 84.97 | 97% | 2019-10-29 |
| Universe | Races | Average WPM | First Race |
|---|---|---|---|
| Default (English) | 2,929 | 89.24 | October 7, 2017 |
| Instant Death Mode | 3 | 99.10 | January 10, 2019 |
| All TypeRacer Texts | 1 | 76.47 | February 24, 2022 |
| New English Texts | 1 | 108.31 | May 26, 2022 |