But for modern evolutionary biology, evolution is a change in gene frequencies from one generation to the next—a definition that derails the authors' argument by page 4. (By way of illustration ...

and transitions between species mark the flow of evolution. But in fact, scientists and philosophers have debated for centuries the precise definition of a species. In high school biology we are ...

Evolutionary developmental biology is the comparative study of organismal development and how it has evolved. There is a particular focus on the genetic basis of phenotypic structures, how they ...