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 |
|---|---|---|---|---|
| 1330. | star (starstrider10) | 75.07 | 96% | 2020-12-14 |
| 1331. | Bea (libbearator) | 75.04 | 98% | 2019-11-08 |
| 1332. | Kyle (badadc) | 75.03 | 95% | 2019-01-22 |
| 1333. | Diz (dzlzrd) | 75.03 | 97% | 2018-12-17 |
| 1334. | Draggory (draggory) | 75.02 | 95% | 2020-11-04 |
| 1335. | YoloswagCashMoney (yolo_s_wag) | 75.01 | 96% | 2018-07-11 |
| 1336. | ⊂( ▀ ͜͞ʖ▀)つ (sch... | 75.00 | 97% | 2020-09-08 |
| 1337. | Joshua (josganp) | 74.91 | 95% | 2019-09-02 |
| 1338. | Ultra (ultra151) | 74.90 | 97% | 2018-11-18 |
| 1339. | Matt (exactstrategy) | 74.85 | 95% | 2019-12-01 |
| 1340. | Rodrigo (rugoso) | 74.84 | 97% | 2018-04-11 |
| 1341. | Ian (deanoid) | 74.83 | 96% | 2019-09-08 |
| 1342. | Kevin (ksogata) | 74.82 | 96% | 2020-09-06 |
| 1343. | unholycloak5 (unholycloak5) | 74.79 | 97% | 2018-04-21 |
| 1344. | arigrate (mercury80) | 74.78 | 96% | 2018-02-14 |
| 1345. | zion=overrated (ziongotnohops) | 74.75 | 95% | 2020-05-12 |
| 1346. | Ava (spritemite) | 74.74 | 96% | 2019-05-19 |
| 1347. | Pedro (pelohi) | 74.72 | 96% | 2018-09-20 |
| 1348. | Jiong Yang (yangfoo) | 74.71 | 96% | 2020-11-19 |
| 1349. | Seri (vincent_aik) | 74.70 | 95% | 2018-03-24 |
| 1350. | UsAndFriends (usandfriends) | 74.69 | 96% | 2018-03-13 |
| 1351. | Daniel (danielwaker) | 74.68 | 97% | 2017-10-21 |
| 1352. | Tristan (cooliofashizzle) | 74.68 | 95% | 2018-12-25 |
| 1353. | No Mistakes (apsnacks) | 74.67 | 98% | 2020-07-22 |
| 1354. | Nicki (nick1324354) | 74.67 | 96% | 2020-11-09 |
| 1355. | asşlkegjaşslkrejg (nervana) | 74.64 | 95% | 2020-06-03 |
| 1356. | the (dragonon) | 74.63 | 95% | 2020-03-04 |
| 1357. | Lucky (albatross1337) | 74.63 | 95% | 2020-04-02 |
| 1358. | iNflUx (influxo) | 74.62 | 96% | 2020-12-07 |
| 1359. | 𝙊𝙈𝙀𝙂𝘼𝙇... | 74.61 | 96% | 2018-06-28 |
| 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 |