a multicellular body (100-150 different cell types), compared with 10-20 in plants and fungi.

The first evidence of multicellular organization, which is when unicellular organisms coordinate behaviors and may be an evolutionary precursor to true multicellularity, is from cyanobacteria-like organisms that lived 3.0-3.5 billion years ago. Decimeter-scale multicellular fossils have been found as early as 1.56 Bya.

Loss of multicellularity

Loss of multicellularity occurred in some

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