ANT208H1 Lecture Notes - Lecture 3: Coevolution, Microevolution, Adaptationism

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5 Apr 2012
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Idea that all living organisms have changed over time. The most widely tested and accepted theory to explain the natural world would be the theory of natural selection. Evolution: change in the average phenotype(s) over time. Change in the way members of population(s) appear. Fitness survival and reproduction (whether direct or indirect). Measures how well one group does against another group. Change in the relative frequency of genes within the gene pool. Some changes are non-adaptive- geno-typically and/or phenotypically. Transmission typically occurs through direct means like reproduction. Length of time ensued is typically measured through: The lack of genetic mutation would result in the lack of natural selection. All of the above involve tradeoffs and constraints. Exaptations: 3 middle ear bones of tetrapris. Most traits result from small changes that accumulated over time. Types of changes therefore depend on starting materials": Types of change(s) depend on the environment concerned. Selection is not the only mechanism of evolution.

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