Bacteria evolve macroscopic multicellularity by the genetic assimilation of phenotypically plastic cell clustering.

Abstract excerpt

The evolutionary transition from unicellularity to multicellularity was a key innovation in the history of life. Experimental evolution is an important tool to study the formation of undifferentiated cellular clusters, the likely first step of this transition. Although multicellularity first evolved in bacteria, previous experimental evolution research has primarily used eukaryotes. Moreover, it focuses on...

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