evolution notes - but not in structure are not derived from...

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EVOLUTION Define “evolution”: Gradual changes that have transformed life over An immense period of time A. Evidence of evolution 1. Fossil record 2. Geographic distribution-continental drift 3. Similarities in structure 4. Similarities in development 5. Molecular biology-(DNA, Proteins) B. Fossil Record 1. Define a “fossil”-preserved remains or markings left by organisms that lived in the past. 2. Fossils are cast in sedimentary rock , but can also be imprinted, mineralized, frozen, or preserved in amber (petrified tree sap) C. Geographic Isolation: traits of organisms are directly linked to the geography and environmental conditions of an area D. Homologous structures 1. Define : different organisms that have similar bone structure. E. Analogous structures 1. Define : features of different species that are similar in function
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Unformatted text preview: but not in structure are not derived from a common ancestor, but evolved in response to similar environmental challenge. 2. Name 2 examples: Insects and birds both have wings to fly although their wing structure is very different in structure. F. Vestigial structures 1. Define: remnants of structures that may have had important functions in an ancestral species but have no current function. 2. Examples of vestigial structures: Human appendix G. Similarities in Development “embryology” 1. Embryos of closely related organisms have similar stages in development H. Molecular biology 1.Similar DNA suggests an evolutionary relationship. Examples: Humans DNA is most similar to the...
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