What messages are passed from cell to cell? How do cells respond to these messages?.Cells most often communicate by chemical signals, although signals may take other forms.Ĭoncept 11.1 External signals are converted into responses within the cell.The ubiquity of these mechanisms provides additional evidence for the evolutionary relatedness of all life.Biologists have discovered universal mechanisms of cellular regulation involving the same small set of cell-signaling mechanisms. ![]() Communication between cells is also important for many unicellular organisms.Cells must communicate to coordinate their activities. ![]() ![]()
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