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9 Cards in this Set
- Front
- Back
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The biological species concept |
Defines a species as a population or group of populations whose members have the potential to interbreed in nature and produce viable fertile offspring. Does not apply to asexual organism, fossils, single organism |
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Species |
-The line between microevolution and macroevolution -so it's the scale that beyond which the mechanisms of evolution act independently. -different populations can still interact via gene flow - different species generally don't. Different species have independent gene pools and evolutionary trajectories |
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Biological species concept focuses |
the study of speciation on the study of the evolution of reproductive isolation -which is the existence of biological factors that impede members of two species from producing viable, fertile hybrids -confirms a lack of gene flow the legal definition of a species |
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Morphological species concept |
Characterizes a species in terms of its body shape, size, and other structural features. |
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Ecological species concept |
Characterizes a species in terms of its ecological niche (resource needs and job) ex food |
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Phylogenetic species concept |
Defines a species as a set of organisms with a unique genetic history - the smallest group of organisms with an independent, unique genetic history -can use molecular data instead of behavioral data to infer a lack of gene flow -Applies to all organisms including: Asexual, fossils |
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Cryptic species |
species that are morphologically identical but genetically distinct (no gene flow for a long time) |
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Allopatric speciation most frequent |
forms a new species while geographically isolated |
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Sympatric speciation |
a subset forms a new species without geographic separation |
