I'm doing a phd in chemistry <a href=" http://www.cizgifilmizle.org/fixation-psychology-example.html#grain ">fixation of an undescended testis in the scrotum</a>  Dr Castillo observed: "Traditionally, species have been named by taxonomists to record a number of things, such as its external appearance, its place of origin or as a dedication to a person, often the discoverer.