Eukaryote

biology evolution complexity

Definition

Eukaryote

A Eukaryote is an organism whose cells contain a nucleus and other membrane-bound organelles. They constitute one of the three domains of life, alongside bacteria and archaea, and include all multicellular life such as plants, animals, and fungi.

Evolutionary Transition

The emergence of eukaryotes represents a “major evolutionary transition” driven by symbiogenesis. This event occurred approximately two billion years ago when an archaeon host engulfed a bacterium, which subsequently evolved into the mitochondrion.

Intuition

Eukaryotes demonstrate that evolution’s creative half is revolution through symbiosis. By merging two distinct, dynamically stable entities into a cooperative whole, life opened a new combinatorial design space that eventually allowed for the development of multicellularity.