CGS NS 201 Lecture Notes - Lecture 11: Catastrophism, Notochord, Andes
6 Apr 2016
School
Department
Course
Professor
Document Summary
An ancestral trait was present in the ancestor of a group. Derived characters can revert back to the ancestral state in a process know as. Evolutionary reversal: ex: most frogs do not have lower teeth, but ancestor of frogs did; one frog genus has regained teeth in the lower jaw. Similarities in development patterns may reveal evolutionary relationships: ex: sea squirts and vertebrates all have notochord at some time in their development. Similarly in hox or hom genes may suggest evolutionary relationships. University of edinburgh: study medicine, couldn"t handle surgery, interest in natural history began. Christ college, cambridge university: preparing for clergy (need b. a. , growing interest in natural history. Offered position as unpaid naturalist by captain robert fitzroy on hms beagle. Aim of voyage to produce nautical charts and conduct survey of southern south america. No formal training in science (was only 22) He took with him several books: the bible, philosophy, natural history, geology (but catastrophist books)
