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0The paper reviews the microevolutionary processes that drive the independent evolution of multicellularity across various life forms. It breaks down this transformative transition into key challenges, including group formation, the attainment of Darwinian individuality, and the development of functional integration and cellular specialization. Through comparative genomics and laboratory evolution experiments, the authors demonstrate that multicellular traits often emerge readily by repurposing ancestral unicellular machinery or through biophysical and ecological scaffolding. Finally, the sources explore how environmental shifts and genomic architecture have influenced why complex multicellularity remains a rare, highly contingent phenomenon.
References:
Ozan Bozdag G, Tong K, Yunker P J, et al. Overcoming key challenges in the evolutionary transition to multicellularity[J]. Nature, 2026, 658(8135): 327-336.
