...This book has argued for the reality of a class of biological entities that have a hard time finding their place in a theory of evolution based on genetics and population biology. These entities, or developmental types, include cell types, homologs, and body plans. The book has also provided...

... in evolutionary biology: functionalism and structuralism. It proceeds by explaining the meaning of developmental types and structuralist concepts arising from macromolecular studies. It also examines facts and ideas about bodies, Rupert Riedl's theory of the “immitatory epigenotype,” and Neil Shubin and Pere...