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 |
|---|---|---|---|---|
| 775. | Dmitry (voidpointer64) | 85.93 | 96% | 2020-09-12 |
| 776. | Jocho Muaguadabo (alezander... | 85.92 | 98% | 2019-10-07 |
| 777. | Luna (vexara) | 85.91 | 98% | 2017-12-09 |
| 778. | tehmbot (timu) | 85.89 | 96% | 2020-12-04 |
| 779. | Jane (janeshepard) | 85.87 | 97% | 2019-09-27 |
| 780. | Felix (exilef) | 85.80 | 98% | 2019-03-31 |
| 781. | YunJae (crimsontide0) | 85.80 | 97% | 2018-06-17 |
| 782. | Nick (njcanderson) | 85.76 | 97% | 2017-12-07 |
| 783. | a (coolguy73) | 85.75 | 96% | 2019-10-31 |
| 784. | Alec (thezoltan94) | 85.74 | 96% | 2018-03-13 |
| 785. | Madison (mnbutler) | 85.63 | 98% | 2018-06-21 |
| 786. | Vest (lordvest) | 85.63 | 97% | 2019-03-28 |
| 787. | Road to HERO (darkmage0103) | 85.62 | 96% | 2018-12-27 |
| 788. | one day 💯 (cyard) | 85.59 | 98% | 2018-12-26 |
| 789. | sdaaa (sdaaa) | 85.57 | 97% | 2018-09-10 |
| 790. | Joe (jophish) | 85.54 | 98% | 2019-04-22 |
| 791. | Flowxrs (flowxrs) | 85.53 | 98% | 2019-06-24 |
| 792. | Micah (minego) | 85.53 | 98% | 2020-06-11 |
| 793. | no name (cannotthinkofaname) | 85.51 | 95% | 2020-10-20 |
| 794. | Rylan (itsmetro) | 85.47 | 96% | 2019-11-25 |
| 795. | Jonas (jnshey) | 85.45 | 97% | 2018-07-04 |
| 796. | Omer (om3rrr) | 85.40 | 97% | 2020-12-15 |
| 797. | Teegey (teegey) | 85.39 | 96% | 2017-12-13 |
| 798. | I (excelsiate) | 85.38 | 98% | 2018-01-06 |
| 799. | sperd (sperd) | 85.38 | 98% | 2019-11-06 |
| 800. | doquan (doquannnn) | 85.38 | 97% | 2019-12-17 |
| 801. | Daniaal (bigchungus_) | 85.37 | 96% | 2020-09-29 |
| 802. | Austin (ajrocks99) | 85.35 | 97% | 2020-10-31 |
| 803. | imako (imako) | 85.35 | 97% | 2018-06-28 |
| 804. | Night (jiddery) | 85.34 | 99% | 2019-12-09 |
| 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 |