by 123 chapter 22 - CHAPTER 22 Descent with Modification A...

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Unformatted text preview: CHAPTER 22: Descent with Modification: A Darwinian View of Life • Evolution links all things together • Evolution- a change in time in the genetic composition of a population • Carolus Lennaeus- a Swedish physician and botanist who sought to classify life’s diversity “for the greater glory of God.” He developed the binomial system of naming spcies. He adopted a nested classification system, grouping similar species into increasingly general categories. • Fossils- the remains or traces of organism from the past, found in sedimentary rocks formed from the sand and mud that settle to the bottom of seas, lakes, and swamps. New layers of sediment cover older ones and compress them into superimposed layers of rock called strata. • George Cuvier- discovered that the older the stratum, the more dissimilar its fossils were to current life- forms and that from layer to layer, some species appeared while others disappeared. o Catastrophism- the principle that events in the past occurred suddenly and were caused by mechanisms different from those operating in the present. Each boundary between strata represented a catastrophe. • James Hutton- proposed that Earth’s geolic features could be explained by gradual mechanism still operating (i.e. valleys were often formed by rivers wearing through rocks and that rocks containing marine operating (i....
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This note was uploaded on 08/07/2009 for the course BY 124 taught by Professor Cusic during the Spring '08 term at University of Alabama at Birmingham.

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by 123 chapter 22 - CHAPTER 22 Descent with Modification A...

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