Why can’t a colony of unicellular organisms be considered a multicellular organism?

The line between colonial and multicellular life is fuzzy; nature does not always comply with strict rules and frameworks.

The difference between colonial and multicellular forms usually depends on the degree of functional specialization among its members. If all members can perform all the basic functions of life for themselves, then none of them depend on others to do what they cannot, then the totality is a colony. If some members perform functions that others cannot, therefore their respective supporting functions are necessary for the survival of the whole community, then it is a multicellular organism.



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