BIOLOGY 1M03 Lecture Notes - Lecture 3: Macroevolution, Genetic Correlation, Natural Experiment
14 Jun 2020
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Document Summary
Theory of evolution: replaced typological thinking which says that species are unchanging types (includes creationism, lamarck (1809) acknowledged that species change. Thought it was teleological (goal-directed; species are trying to get better) [not widely believed]. Darwin and wallace: evolution through natural selection: survival of the ttest". Evolution by natural selection - organisms that have traits that allow them to survive and reproduce will take over the population. Typological thinking - organisms are unchanging and will not change over the course of thousands of years. Change through time: fossil: any physical trace of an organism that lived in the past, fossils can be dated using: Such organisms are extinct (v. extant - still alive: extinction is one piece of evidence that species are changing. Transitional forms: when a species disappears from the fossil record, a similar species often appears, often in the same geographic area, consistent with species evolution : changing through time.
