"The basic framework of the theory is that evolution is a two-stage phenomenon, the production of variation and the sorting of the variants by natural selection. Yet agreement on this basic thesis does not mean that the work of the evolutionist is completed. The basic theory is in many instances hardly more than a postulate and its application raises numerous questions in almost every concrete case. "-Ernst Mayr 
Populations, Species and Evolution  (1970)  p. 6

Department of Biology                                                                                                     Hensill Hall: Lab 745, Office 761

---