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test 1 noteswap - Biology 1202: READ THE BOOK!!!! Read...

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Unformatted text preview: Biology 1202: READ THE BOOK!!!! Read along with the lectures. (same book as 1201) In-class quizzes every day, online quizzes every week Chapter 22: descent with modification, a Change over time of the genetic composition of a population Decent of modern organisms with modification from preexisting organisms Evolutionary adaption o Accumulation of inherited characteristics that enhance organisms ability to survive in specific environments------ Evolution in a historical context: figure 22.2 Catastrophism, gradualism and uniformitarianism o Catastrophism Catastrophes caused extinct species and strata Where were fossils of species that are around today? Hutton and Lyell gradualism and uniforitarianism Slow natural forces (wind, water, earthquakes, volcanoes) caused by stratification of rock Observations of geological formations+ rates processes occur= earth at least millions of yrs old--- Darwinian theory of evolution Lamarck o Inheritance of acquired characteristics Bodies of living organisms are modified through the use of disuse of parts These modifications are inherited by offspring This idea turned out to be wrong Evolution by Natural Science o Darwin and Wallace developed the theory independently Darwin-voyage of the Beagle (explore coast of south America) Natural selection (origin of species) Organisms change in time Organisms derive from one common ancestor Wallace-naturalist in Indonesia Natural selection (published on natural selection) o Darwins focus on adaptation Ex. Finches differed and adapted to the diff environments that they lived in Adapted to resources in their environment Ate diff, beaks were diff o Decent with modification Commonalities b/t diff mammals coming from a common ancestor(fig.22.7) Occupy diff habitats Use diff resources Differences in morphology Natural Selection o The unequal survival and reproduction of organisms due to environmental forces, resulting in the preservation of favorable adaptations o Process selects from what is available in the gene pool o New characteristics are not created on demand Mechanism behind Natural selection (pg.444) o Potential for rapid reproduction o Resources to support population are limited o Population remains stable Within population is struggle to survive and win over weak organisms More powerful have favorable traits to help survive in environment Think a/b 100m dash track and field competition. How can we change this race to reflect the process of natural selection?...
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test 1 noteswap - Biology 1202: READ THE BOOK!!!! Read...

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