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 |
|---|---|---|---|---|
| 948. | gg (ggab) | 82.06 | 97% | 2018-09-20 |
| 949. | Jack (jr9810) | 82.05 | 97% | 2018-08-09 |
| 950. | JJSky (jjsky) | 82.04 | 97% | 2020-03-16 |
| 951. | Mouse (little_mouse) | 82.02 | 97% | 2017-12-19 |
| 952. | Ronald (primarch) | 82.02 | 98% | 2019-07-21 |
| 953. | Sentinel (sentinel) | 82.00 | 97% | 2019-01-25 |
| 954. | Paul (phlap) | 82.00 | 96% | 2020-03-27 |
| 955. | Wilford (wilfordjason) | 81.96 | 97% | 2018-05-10 |
| 956. | Blake (sourkrouth) | 81.94 | 98% | 2018-10-06 |
| 957. | Gabriel (gabe30) | 81.93 | 97% | 2019-11-23 |
| 958. | adtfz (adityakun07) | 81.87 | 96% | 2017-10-21 |
| 959. | Shan (liushanen) | 81.86 | 95% | 2019-12-31 |
| 960. | Coisa boa (restyle) | 81.84 | 97% | 2019-09-12 |
| 961. | AL1 (al1_16) | 81.81 | 98% | 2019-08-29 |
| 962. | SomeGuy (hexadecimal101) | 81.81 | 97% | 2019-09-28 |
| 963. | Iffeffo20 (dobichie) | 81.80 | 96% | 2018-09-16 |
| 964. | KEYGOD (trombaxter) | 81.73 | 97% | 2018-03-22 |
| 965. | Joey (uberliminal) | 81.73 | 97% | 2017-11-28 |
| 966. | Antonin (antonindvorak9) | 81.71 | 96% | 2019-08-27 |
| 967. | WIldan (thecoolbeans) | 81.70 | 96% | 2020-03-18 |
| 968. | Noman (khan_noman14) | 81.69 | 98% | 2018-06-06 |
| 969. | tiam (cyroqt) | 81.66 | 97% | 2020-04-05 |
| 970. | Mkaaztješā¤ (tadas2002) | 81.64 | 95% | 2019-11-29 |
| 971. | suzu (suzu213) | 81.64 | 97% | 2020-12-08 |
| 972. | Stay (stayscaffolded) | 81.63 | 95% | 2020-06-15 |
| 973. | falling down (_nirvana) | 81.63 | 95% | 2018-09-25 |
| 974. | michael (mikul) | 81.62 | 96% | 2018-02-05 |
| 975. | hardik (labeitazer) | 81.62 | 96% | 2020-08-30 |
| 976. | Kakhrii (kakhrii) | 81.61 | 98% | 2019-11-12 |
| 977. | jerm (j3remy) | 81.57 | 95% | 2018-10-25 |
| 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 |