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.
676 total characters in this text.
View Pit Stop page for this text
| Rank | Username | WPM | Accuracy | Date |
|---|---|---|---|---|
| 405. | (pea_nut) | 96.77 | 97% | 2020-03-03 |
| 406. | Hawky (itshawky) | 96.66 | 98% | 2020-08-06 |
| 407. | dudududu (er132er) | 96.62 | 97% | 2019-09-18 |
| 408. | tstats[marin049] (marin049) | 96.61 | 96% | 2018-12-29 |
| 409. | Kasper (kaspervdpol) | 96.56 | 96% | 2020-07-03 |
| 410. | (nicolai2001122) | 96.51 | 96% | 2020-01-16 |
| 411. | (faa7) | 96.48 | 99% | 2019-03-05 |
| 412. | (shane1302) | 96.48 | 96% | 2020-09-01 |
| 413. | (tomcolemak) | 96.43 | 97% | 2019-01-24 |
| 414. | Nicole (juniper3411) | 96.42 | 97% | 2019-05-28 |
| 415. | (imaryanguydude) | 96.37 | 99% | 2019-10-16 |
| 416. | (superaz2001) | 96.34 | 97% | 2019-04-30 |
| 417. | Dylan🔥🔥 (lynchifer) | 96.27 | 98% | 2017-12-14 |
| 418. | Patrik (itsuberrr) | 96.25 | 97% | 2020-04-24 |
| 419. | Tim (tim_han1234) | 96.24 | 98% | 2020-11-07 |
| 420. | Carter sucks dick (ivortso) | 96.15 | 97% | 2017-10-08 |
| 421. | Joshua (stelldevv) | 96.11 | 99% | 2018-08-26 |
| 422. | (antykingfish2) | 96.10 | 98% | 2017-10-14 |
| 423. | юрій підор (obskur... | 96.00 | 98% | 2020-12-15 |
| 424. | (razertypist) | 95.97 | 96% | 2020-11-17 |
| 425. | bit lee (akazed) | 95.93 | 97% | 2020-06-30 |
| 426. | (schminah) | 95.93 | 98% | 2019-08-07 |
| 427. | (goati_) | 95.90 | 98% | 2019-03-16 |
| 428. | (wincest) | 95.82 | 97% | 2020-09-09 |
| 429. | FoTGReckless (fotg_reckless) | 95.82 | 99% | 2020-06-02 |
| 430. | (kyeavnign) | 95.66 | 97% | 2017-11-07 |
| 431. | (agglomeration2) | 95.66 | 96% | 2020-12-18 |
| 432. | (kingnidhogg) | 95.66 | 96% | 2018-03-07 |
| 433. | themaniax.com (kido2976) | 95.62 | 97% | 2019-09-02 |
| 434. | (codawm) | 95.62 | 97% | 2020-09-11 |
| Universe | Races | Average WPM | First Race |
|---|---|---|---|
| Default (English) | 2,929 | 89.24 | October 7, 2017 |
| Instant Death Mode | 3 | 99.10 | January 10, 2019 |
| All TypeRacer Texts | 1 | 76.47 | February 24, 2022 |
| New English Texts | 1 | 108.31 | May 26, 2022 |