bio lecture 5 - BIO 311D LECTURE 5 Speciation Speciation...

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Unformatted text preview: BIO 311D LECTURE 5 Speciation Speciation What defines a species? What are the criteria we should use? Typological Species concept Typological species A group of organisms in which individuals are members of the species if they sufficiently conform to certain fixed properties. The clusters of variations or phenotypes within specimens (i.e. longer and shorter tails) would differentiate the species. This method was used as a "classical" method of determining species, such as with Linnaeus early in evolutionary theory. However, we now know that different phenotypes do not always constitute different species (e.g.: a 4-winged Drosophila born to a 2-winged mother is not a different species). Species named in this manner are called morphospecies . Morphological species concept Morphological species A population or group of populations that differs morphologically from other populations....
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This note was uploaded on 03/18/2008 for the course BIO 311D taught by Professor Reichler during the Spring '08 term at University of Texas at Austin.

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bio lecture 5 - BIO 311D LECTURE 5 Speciation Speciation...

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