http://digfir-published.macmillanusa.com/morris2e/morris2e_ch22_1.htmlChapter 22 Introduction5602fd30757a2ecd58000000
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http://digfir-published.macmillanusa.com/morris2e/morris2e_ch22_2.html22.1 The Biological Species Concept
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http://digfir-published.macmillanusa.com/morris2e/morris2e_ch22_3.htmlSpecies are reproductively isolated from other species.
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http://digfir-published.macmillanusa.com/morris2e/morris2e_ch22_4.htmlThe BSC is more useful in theory than in practice.
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http://digfir-published.macmillanusa.com/morris2e/morris2e_ch22_5.htmlThe BSC does not apply to asexual or extinct organisms.
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http://digfir-published.macmillanusa.com/morris2e/morris2e_ch22_6.htmlRing species and hybridization complicate the BSC.
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http://digfir-published.macmillanusa.com/morris2e/morris2e_ch22_7.htmlEcology and evolution can extend the BSC.
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http://digfir-published.macmillanusa.com/morris2e/morris2e_ch22_8.html22.2 Reproductive Isolation
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http://digfir-published.macmillanusa.com/morris2e/morris2e_ch22_9.htmlPre-zygotic isolating factors occur before egg fertilization.
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http://digfir-published.macmillanusa.com/morris2e/morris2e_ch22_10.htmlPost-zygotic isolating factors occur after egg fertilization.
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http://digfir-published.macmillanusa.com/morris2e/morris2e_ch22_11.html22.3 Speciation
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http://digfir-published.macmillanusa.com/morris2e/morris2e_ch22_12.htmlSpeciation is a by-product of the genetic divergence of separated populations.
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http://digfir-published.macmillanusa.com/morris2e/morris2e_ch22_13.htmlAllopatric speciation is speciation that results from the geographical separation of populations.
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http://digfir-published.macmillanusa.com/morris2e/morris2e_ch22_14.htmlDispersal and vicariance can isolate populations from each other.
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http://digfir-published.macmillanusa.com/morris2e/morris2e_ch22_15.htmlCo-speciation is speciation that occurs in response to speciation in another species.
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http://digfir-published.macmillanusa.com/morris2e/morris2e_ch22_16.htmlCase 4: How did malaria come to infect humans?
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http://digfir-published.macmillanusa.com/morris2e/morris2e_ch22_17.htmlSympatric populationsâthose not geographically separatedâmay undergo speciation.
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http://digfir-published.macmillanusa.com/morris2e/morris2e_ch22_18.htmlSpeciation can occur instantaneously.
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http://digfir-published.macmillanusa.com/morris2e/morris2e_ch22_19.html22.4 Speciation and Selection
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http://digfir-published.macmillanusa.com/morris2e/morris2e_ch22_20.htmlSpeciation can occur with or without natural selection.
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http://digfir-published.macmillanusa.com/morris2e/morris2e_ch22_21.htmlNatural selection can enhance reproductive isolation.
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http://digfir-published.macmillanusa.com/morris2e/morris2e_ch22_22.htmlChapter 22 Summary5602fd30757a2ecd58000000
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