Growth and Differentiation
The physiology of individual organisms varies a great deal more than the physiology of individual cells, regardless of their origin. Thus a mouse can develop cancer; E. coli cannot. The highest order of coherence in the “society” of many different, or differentiated, cells of a multicellular organism begins with unequal cell divisions very early in the life history of the organism. Indeed in many organisms it begins with the very first cell division of the fertilized egg.
KeywordsAnimal Pole Nondividing Cell Early Gastrula Epidermal Growth Factor Concentration Amphibian Oocyte
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