1. Descent with Modification Chapter 22 A Darwinian View of Life- 1. challenged---a young Earth inhabited by unchanging species

2. Objective Describe a typical sequence of events of fossilization. What is the main mistake usually made in movies about the earliest Earth history?

3. History of Biological Diversity Scientific Inquiry: led to the theory of evolution by natural selection. Diversity : concepts of genetics-phylogeny Energy: organisms used in metabolism from 1 st cell until today. Homeostasis: populations and communities might develop adaptation due to long-term disruptions.

4. Change: natural selection results in long- term change, or evolution, of populations to produce new species. 429-Hutton, Malthus, Lamarck, Lyell, Darwin, Wallace-theory, The Origin of Species-1859, Mendell-1865.

5. Fossilization- Categories Trace fossils-indirect evidence left by Molds and casts- impression of an organism Replacement- remains are replace by minerals Petrified or permineralized empty pore spaces are filled in by minerals. Amber- preserved tree sap traps organism Original material- mummification/ freezing

6. Lamarck-Acquired Characteristics Concept of use and disuse, idea that those parts of the body used extensively to cope with the environment become larger and stronger; while those not used deteriorate. The inheritance of acquired characteristics to pass on to the offspring.

7. Darwin’s focus on Adaptation Origin of Species developed two main points: the occurrence of evolution and natural selection as its mechanism. Natural hierarchy of Linnaean scheme: kingdom>phylum>class>order>family> genus>species.

8. Darwin’s main ideas Natural selection is differential success in reproduction. Occurs through an interaction between the environment and the variability inherent among the individual organisms making up a population. The product is the adaptation of organisms to their environment.

9. Homologies Homologous structures Vestigial organs Embryological homologies Molecular homologies Homologies and the tree of life

10. Homework Read Chapter 22---pp. 429---443 Complete questions #1—16. Due Wednesday—material for fossilization and play-doh; questions to share with class. Class will evaluate the quality of the fossil by responding to your questions on Friday.