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14 Cards in this Set
- Front
- Back
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Morphological species concept |
Call species different because they look different |
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Biological species concept |
Groups of actually/potentially interbreeding natural populations which are reproductively isolated from such other groups |
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Phylogenetic species concept |
Group of populations evolved together with diagnostic features |
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Ecological species concept |
Used with similar asexual organisms that occupy different niches |
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Briefly describe how a prezygotic reproductive isolating mechanism differs from a postzygotic reproductive isolating mechanism |
Pre zygotic: Behavioral Mechanical Temporal Ecological Gametic Post zygotic: Hybrid Inviability Hybrid Sterility |
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Some populations of organisms do not interbreed because reproduction takes place at different times of the day, season, or year. |
Temporal |
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Organisms do not interbreed because they do not recognize each other’smating displays. |
Behavioral |
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Two individuals mate and produce offspring, but the offspring are sterile |
Hybrid Sterility |
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Which type of speciation occurs when one population becomes geographically separated from the rest of the populations of the species, and subsequently evolves (by natural selection and/or genetic drift) to the point where a barrier to reproduction is produced? |
Allopatric |
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How does the taxonomic hierarchy accommodate (or recognize) populations that are distinctively different from other populations of the same species, but are not yet reproductively isolated from those other populations? |
Subspecies |
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Speciation through ploidy changes is an example of: |
Sympatric |
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Which form of polyploidy results from the following two steps? 1) hybridization between two similar species of plants (resulting hybrids may be sterile) 2) doubling of the number of chromosomes (e.g. by nondisjunction) |
Sympatric Speciation |
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Which form of polyploidy results from the doubling of the number of chromosomes (without hybridization) resulting (for example) in tetraploid individuals |
Allopolyploidy |
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What would you predict would happen if an autopolyploid and its diploid ancestor had exactly the same niche preferences? |
Genetically Identical- One will go extinct |
