a comparative study of development from the seemingly simplicity of an egg to the mature form ..and points out the universality of certain phenomena of growth ...a discussion of the chemistry and physics involved in development leads to an interpretation of patterns of growth, patterns of morphogenetic movements, polarity and symmetry and patters of differentiation ...
John Tyler Bonner is the George M. Moffett Professor Emeritus of Biology at Princeton University, a pioneer in the use of cellular slime molds to understand evolution and development, and one of the world's leading experts on cellular slime molds.