EVR 1001 Lecture Notes - Lecture 4: Holocene Extinction, Florida Scrub Jay, Genetic Drift
19 Sep 2016
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Document Summary
The variety of ecosystem within a given region. Species richness the number of species in a given area. Species evenness the relative abundance of the different species in a area (dominance). The genetic composition of a species changes over time. Microevolution evolution occurring within a species. Macroevolution - evolution that given rise to new species or larger groups, such as genera, family, class, or phyla. Genes hereditary unit representing a dna sequence located on chromosomes in nucleus. These code for inherited traits, which may or may not be expressed in a physical organism. Genotype the complete set of genes in an individual. All the genes within an organism are also collectively called genome. Darwin"s theory of evolution by natural selection: point #1. Darwin"s theory of evolution by natural selection: point #2: some of this variation is inherited. Darwin"s theory of evolution by natural selection: point #3: some inherited variation makes some individuals better adapted to survive.
