BIL 250 Lecture Notes - Lecture 9: Matthias Jakob Schleiden, Theodor Schwann, Louis Pasteur

• School: University of Miami
• Department: Biology
• Course: BIL 250
• Professor: karenalvarezdelfin

Document Summary

Translational medicine: process in which genetic findings are directly translated into new and improved methods of diagnosis and treatment. Studied reproduction and development and proposed the theory of epigenesis : organisms develop from the fertilized egg by a succession of developmental events that eventually transform the egg into an adult. Confilicted with the theory of preformation: fertilized egg contains a complete miniature adult, called a homonucleus. Proposed the cell theory: all organisms are composed of basic structural units called cells, which are derived from preexisting cells. Spontaneous generation : creation of lving organsims from nonliving components, was disproved by louis pasteur later in the 19th century (1850 ish) Living organisms were then considered to be derived from preexisting organisms and to consist of cells. Geological, geographical, and biological observations convinced him that existing sepcies arose by descent with modification from ancestral species. Natural selection : presented an explanation of the mechanism of evolutionary change.