Organisms can exist as single cells and aggregate into multicellular forms
the verdict
SUPPORTED
the evidence backs this
confidence 88/100
Organisms can exist as single cells and aggregate into multicellular forms, as supported by numerous evolutionary models and biological examples of reversible transitions between unicellular and multicellular states.
Evidence for · 6
Division of labour and the evolution of multicellularity
2011 · cited by 133
Paper 0 develops models showing how multicellular aggregates emerge from unicellular ancestors due to physiological advantages.
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More for · 5
Disadvantages and benefits of evolved unicellularity versus multicellularity in budding yeast
2019 · cited by 27
Paper 3 demonstrates that yeast species can transition reversibly between unicellular states and multicellular clump-forming states.
Clonal-aggregative multicellularity tuned by salinity in a choanoflagellate.
2026 · cited by 6
Paper 5 shows that certain choanoflagellates undergo reversible transitions between unicellularity and multicellularity.
Adaptive evolutionary trajectories in complexity: Transitions between unicellularity and facultative differentiated multicellularity
2025 · cited by 4
Paper 7 discusses adaptive trajectories where organisms transition between strict unicellularity and facultative multicellularity.
Evolutionary trade-offs between unicellularity and multicellularity in budding yeast
2018 · cited by 4
Paper 8 highlights the evolutionary trade-offs and switching mechanisms between unicellular and multicellular forms in budding yeast.
Genetic switch between unicellularity and multicellularity in marine yeasts
2026 · cited by 2
Paper 10 identifies genetic switch mechanisms that enable marine yeasts to alternate between unicellular and multicellular states.