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the claim

Certain single-celled organisms have evolved secondarily from multicellular ancestors

the verdict
SUPPORTED
the evidence backs this
Recorded sources
4 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Evidence from experimental and modeling studies on yeast and evolutionary complexity demonstrates that certain single-celled organisms can evolve secondarily from multicellular ancestors.

The analysis

The claim is specific, empirical, and falsifiable. All retrieved papers provide direct evidence supporting the reversibility of multicellularity, showing that organisms can transition from multicellular states back to unicellularity.

Evidence for · 4
Adaptive evolutionary trajectories in complexity: Transitions between unicellularity and facultative differentiated multicellularity
Recorded source metadata

Hanna Isaksson, Peter Lind, Eric Libby. Adaptive evolutionary trajectories in complexity: Transitions between unicellularity and facultative differentiated multicellularity. 2025. https://doi.org/10.1073/pnas.2411692122

Demonstrates through mathematical models that evolutionary trajectories can result in the loss of complexity and a return to unicellularity.

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More for · 3
Evolutionary trade-offs between unicellularity and multicellularity in budding yeast
Recorded source metadata

Jennie J. Kuzdzal-Fick, Lin Chen, Gábor Balázsi. Evolutionary trade-offs between unicellularity and multicellularity in budding yeast. 2018. https://doi.org/10.1101/347609

Shows that unicellular yeast strains can evolve secondarily from multicellular clump-forming ancestors.

Evolution of multicellularity and unicellularity in yeast <i>S. cerevisiae</i> to study reversibility of evolutionary trajectories
Recorded source metadata

Phaniendra Alugoju, Anjali Mahilkar, Supreet Saini. Evolution of multicellularity and unicellularity in yeast <i>S. cerevisiae</i> to study reversibility of evolutionary trajectories. 2020. https://doi.org/10.1101/2020.08.15.252361

Examines the reversal of multicellularity in yeast, demonstrating that unicellularity evolves from multicellular clusters when selection pressures change.

Adaptive evolutionary trajectories in complexity: repeated transitions between unicellularity and differentiated multicellularity
Recorded source metadata

Hanna Isaksson, Peter Lind, Eric Libby. Adaptive evolutionary trajectories in complexity: repeated transitions between unicellularity and differentiated multicellularity. 2024. https://doi.org/10.1101/2024.05.14.594091

Indicates that adaptive trajectories can lose complexity, leading to transitions from multicellular forms back to unicellularity.

The paper trail · every fact has a biography
first checked01 Aug 2026
judged → SUPPORTED · 7901 Aug 2026
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