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  1. Multicellular organism - Wikipedia

    Multicellularity allows an organism to exceed the size limits normally imposed by diffusion: single cells with increased size have a decreased surface-to-volume ratio and have difficulty absorbing sufficient …

  2. Life - Multicellularity, Evolution, Adaptation | Britannica

    Dec 13, 2025 · Since multicellularity evolved independently in every major group of microorganisms, the blurred distinction between single-celled and many-celled organisms has become obsolete.

  3. Understanding Multicellularity: The Functional Organization of the ...

    Sep 18, 2019 · Multicellularity is a widespread phenomenon that cuts across all the domains of life, spanning from bacterial biofilms to plants and metazoans. Its most ancient eukaryotic instances date …

  4. The many roads to and from multicellularity - PMC

    In this review, we highlight recent developments and pitfalls in understanding the evolution of multicellularity with an emphasis on plants (here defined broadly to include the polyphyletic algae), …

  5. What Are Multicellular Organisms? Definition & Examples

    Aug 22, 2025 · Learn how multiple cells interact and organize to create diverse and complex life forms.

  6. Multicellularity | Research Starters - EBSCO

    Multicellularity refers to the condition of an organism consisting of more than one cell, a defining characteristic of certain life forms.

  7. Multicellularity – IB HL Biology Revision Notes

    Dec 16, 2024 · Learn about multicellularity for your IB Biology. Find information on cell specialisation, tissue organisation and the evolution of multicellular organisms.

  8. From single cells to complex creatures: New study points to origins of ...

    Jun 17, 2025 · Researchers at UChicago discover key innovations that allowed modern, multicellular animals to emerge. Animals, from worms and sponges to jellyfish and whales, contain anywhere …

  9. How did life get multicellular? Five simple organisms could ... - Nature

    Aug 27, 2025 · Across all known life, the move to multicellularity happened at least 40 times, suggests one study 1. But, in animals, it seems to have occurred only once. Beginning in the early 2000s,...

  10. Multicellularity | Organismic Animal Biology: An Evolutionary …

    Multicellularity has evolved via two main paths. One path is via aggregation of genetically diverse cells in order to function together. The second path is via clonal division of single cell, with the daughter cells …