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 |
|---|---|---|---|---|
| 1084. | Nick (nicklong1599) | 79.56 | 97% | 2018-08-21 |
| 1085. | Rearia (rearia) | 79.54 | 94% | 2018-07-10 |
| 1086. | Aven (avenue3) | 79.49 | 95% | 2020-06-14 |
| 1087. | Snader (mrsander) | 79.47 | 93% | 2020-10-14 |
| 1088. | :O (andrewhl01) | 79.47 | 96% | 2018-11-07 |
| 1089. | fnrslvr (fnrslvr) | 79.45 | 98% | 2018-09-24 |
| 1090. | Smol (smol_potot) | 79.45 | 98% | 2018-11-04 |
| 1091. | DIGITEI COM A BUNDA (gel4ever) | 79.43 | 97% | 2020-02-10 |
| 1092. | Isaias (mindblowers) | 79.43 | 97% | 2018-09-25 |
| 1093. | Noggie (noggie) | 79.41 | 97% | 2020-04-28 |
| 1094. | Gary (garrigan) | 79.37 | 97% | 2018-12-20 |
| 1095. | Ruby (rhubarbo) | 79.31 | 98% | 2018-06-09 |
| 1096. | Jizz (mamski) | 79.31 | 97% | 2018-01-12 |
| 1097. | Simon (jangjun0901) | 79.29 | 96% | 2019-05-23 |
| 1098. | Tom (stacked_dude) | 79.20 | 97% | 2019-01-26 |
| 1099. | Jimmy (jx297) | 79.18 | 99% | 2018-02-01 |
| 1100. | J (coughee) | 79.17 | 97% | 2018-06-13 |
| 1101. | Josh (j2k__) | 79.17 | 97% | 2019-01-26 |
| 1102. | Peter (shortty10) | 79.17 | 95% | 2018-09-08 |
| 1103. | Dog acc (vick02) | 79.17 | 96% | 2020-05-16 |
| 1104. | dean (aydeano) | 79.17 | 96% | 2020-11-26 |
| 1105. | Tor (partytor) | 79.14 | 96% | 2020-10-07 |
| 1106. | Samuel (sonicst) | 79.11 | 95% | 2019-02-03 |
| 1107. | Jeld (jeld) | 79.09 | 98% | 2019-05-06 |
| 1108. | Hrijul (avius) | 79.09 | 95% | 2020-03-12 |
| 1109. | Jeffrey (jophee) | 79.09 | 97% | 2019-02-26 |
| 1110. | Jacob (xgabumanx) | 79.04 | 96% | 2019-07-15 |
| 1111. | Cisco (yizzyweezy) | 79.03 | 95% | 2020-04-14 |
| 1112. | Alexander (torphon) | 78.97 | 98% | 2019-01-06 |
| 1113. | 푸푸피피 (f6zqygeti2yql... | 78.97 | 96% | 2020-11-30 |
| 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 |