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20 Cards in this Set
- Front
- Back
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Species |
taxonomicunits to which taxonomists like Linnaeus assigned species |
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Morphological/Typological Species Concept |
specimens considered to belong to the species ifthey agree morphologically with type of species |
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Type Specimen |
asingle individual (usually) that represents the entire speciescuq9 |
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Cryptic Speciestml>cuq9 |
speciesthat cannot be distinguised on the basis of their morphological characteristics\uN< |
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Phenotypic Plasticitycuq9 |
morphologicalvariation that does not have a genetic basis; environmentally inducedl>\uN< |
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Biological Species Concept |
groups of interbreeding natural populations thatare reproductively isolated from other such groups |
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Interspecific hybridization |
hybridizationbetween different species |
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Monophyletic groups |
taxathat contain all of the konwn descendant of a single common ancestor |
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Phylogenetic Species Concept |
species consists of a population or group ofpopulations that share a common evolutionary fate through time |
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Allopatric Speciation |
occurs when you get physicalisolation of populations |
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occurs when you get physicalisolation of populations |
movefrom one place to another, rare chance |
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Vicariance |
separationforms in middle of territory |
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Sympatric Speciation |
whenisolation and divergence occur at the same place and time |
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Incipient Species |
newspecies, capable of interbreeding |
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Resource Polymorphism |
individualswithin a population exploit and specialize different food sources |
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Secondary Contact |
· two groups diverged allopatrically |
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Hybrid Zones |
geographiccontact zone where interbreeding occurs and the frequency of hybrids can behigh |
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Introgressive Hybridization |
interbreedand merge back into single lineages |
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Reinforcement |
involvesassortative mating, results in evolution of isolating mechanismsthat prevent hybridization |
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Character Displacement |
disruptiveselection increasing differences between two parental lineages |
