Biology / Unit 8 Bio 1823 short lesson, about 20 seconds
Competing Hypotheses for the Eukaryotic Nucleus's Origin
Captions available
The idea
Three hypotheses compete for how the eukaryotic nucleus arose, nucleus-first, mitochondria-first, and eukaryote-first, and the field has not settled which, if any, is correct.
In practice
Nucleus-first proposes the nucleus evolved before mitochondria joined; mitochondria-first proposes the reverse; eukaryote-first proposes prokaryotes evolved from eukaryotes by losing genes and complexity.
Where people slip
All three hypotheses remain testable and contested — this entry declares no winner.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Unlocks
- Nothing yet depends on this.
Something wrong in this lesson? Flag it · Sources for Biology