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28 Cards in this Set
- Front
- Back
Species
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Orgamizms that breed and produce fertile offspirng
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Synpatic speciation
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Occur when new mechanism devolop even though population shore a habitat
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Para patric speciation
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When the two genetically different population shave bordering habitats or when nearby population expirence diffents genetic change
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Postzygotic Mechanisms
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Fertilazation occurs but offspring are weak
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prezygotic mechanisms
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Egg is not fertilized so there is no offspring
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puncutated equilibrium
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A period of no change made by a new period of fast evolution
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equilibruim
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A period of no change marked by a period of fast evolution
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Examples of vegistal structures
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appendix, wisdom teeth, tonsils.
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Gradualoism
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very slow change over several generations
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Vestigial structures
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Structure that are present but no longer functional or are not necessary for survival
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Extiicntion
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Inerversible dissaperament of an entire species off the planet
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Coevolution
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Two or more species nonevolving in respnse
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Reproductive isolation
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an important factor preventing speciation
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speciation
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The emergency of new species due to genetic mutationand change
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Geographical differentation
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genetic differences resulting from differet influences for natural selection due to different enviroment
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Allopatric speciation
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Common to plants and animals
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Evolution
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change in the dna of population over time
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Natural selection
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Describes the unequal survival and reproduction of organisms that result in the presence or absence of inherited traits
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Darwins theory
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process of natural selection drives evolution
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Lamarcks theory
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Devolop a thory of evolution before darwin
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Malthus Theory
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population size are controlled by nature
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Mendals discovery
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Studied genetics of pea plants dominant genes is T recessive gene is t
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Howells throry
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Geologic dating can be dated to a time period
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Homologus structure
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Similar bones conected even though they may ahve a different function
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Adaptation
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A charecteristic genetic that increases chances of survivial in a particular enviroment
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Examples of analogous structures
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whale fin, fish fin
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Divergent evolution
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Is the process of two or more related species becoming more and more disimilar
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Convergent evolution
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the emergence of biologival
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