Chapter 14 Objectives (97% in the course

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Louisiana State University
Biological Sciences
BIOL 3040

Chapter Learning ObjectivesChapter 14 Species and Speciation141 The Species ProblemDefine and evaluate the pros and cons of the following species conceptsoEvolutionary species conceptSpecies is a lineage of populations which maintains its identity form other such species lineages and which has its own evolutionary tendencies and historical fateoPhenetic species conceptDraws species boundaries around clusters of phenotypically similar individuals or populationsoBiological species conceptA species is composed of groups of actually or potentially interbreeding populations which are reproductively isolated form other such groupsoPhylogenetic species conceptSpecies is the smallest monophyletic group distinguished by a shared derived character142 Modes of SpeciationDescribe and give an example of allopatric speciationoAllopatric speciation speciation takes place in populations that are geographically isolated from one another oEx Isthmus of PanamaoDistinguish between the dumbbell and peripheral isolate models of allopatric speciationDumbbell model an initially large population is subdivided into new populations that are themselves relatively largePeripheral isolate model the popula
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