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13. Figure 16.21 A model for the evolution of a multicellular organism from a unicellular protist.
A unicellular protist colony, in which cells divide but remain attached early multicellular organism with specialized, interdependent cells later organism with increased specialization, including sex cells and somatic cells.
Figure 16.21 A model for the evolution of a multicellular organism from a unicellular protist.
A unicellular protist colony, in which cells divide but remain attached early multicellular organism with specialized, interdependent cells later organism with increased specialization, including sex cells and somatic cells.