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 |
|---|---|---|---|---|
| 1267. | . (trihard7) | 75.87 | 97% | 2017-12-11 |
| 1268. | t (zyxx) | 75.86 | 96% | 2019-08-27 |
| 1269. | Ryan (ramp15514) | 75.86 | 95% | 2020-04-08 |
| 1270. | Jonathan (jonfranche) | 75.86 | 97% | 2020-03-15 |
| 1271. | k (mc0sta) | 75.84 | 97% | 2020-11-14 |
| 1272. | じょりちっち (jorichi... | 75.82 | 99% | 2019-07-15 |
| 1273. | weicer (weicer) | 75.78 | 98% | 2020-08-29 |
| 1274. | Saidoh (saidoh) | 75.77 | 97% | 2018-03-03 |
| 1275. | Leander (hactar) | 75.77 | 97% | 2018-08-15 |
| 1276. | Rob (destructo91) | 75.76 | 96% | 2020-02-17 |
| 1277. | Peter (speedyboi95) | 75.75 | 97% | 2020-07-26 |
| 1278. | ekrpat (ekrpatdvorak) | 75.75 | 95% | 2020-01-21 |
| 1279. | tstats[jancs] (jancs) | 75.73 | 94% | 2020-09-12 |
| 1280. | joe (lerler246) | 75.71 | 96% | 2019-09-11 |
| 1281. | cccc (jonathan12panal) | 75.69 | 95% | 2018-02-16 |
| 1282. | nika (nika07) | 75.66 | 98% | 2020-08-09 |
| 1283. | Tinnaphop (mistertfy64) | 75.65 | 96% | 2020-08-27 |
| 1284. | Logan (loganb123) | 75.65 | 97% | 2018-10-31 |
| 1285. | lesseH (yung_lesseh1337) | 75.64 | 95% | 2019-09-24 |
| 1286. | Enrique (optimus_line) | 75.64 | 97% | 2018-07-03 |
| 1287. | hung_trap (qt_trap) | 75.60 | 97% | 2019-01-06 |
| 1288. | aaa (jackedgar) | 75.58 | 98% | 2019-02-14 |
| 1289. | Peter (dletastar4) | 75.58 | 97% | 2018-04-21 |
| 1290. | Cole (pokeopeth) | 75.57 | 97% | 2019-10-20 |
| 1291. | efergodox (efergodox) | 75.56 | 97% | 2019-11-26 |
| 1292. | Markus (mkh90) | 75.55 | 97% | 2020-10-21 |
| 1293. | Laura (laurasee) | 75.51 | 97% | 2020-11-29 |
| 1294. | Simon (spookles) | 75.48 | 97% | 2018-09-14 |
| 1295. | Jagonu (jagonu) | 75.48 | 95% | 2018-03-30 |
| 1296. | Jamber (jamber_onyx) | 75.47 | 98% | 2019-09-24 |
| 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 |