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Lecture Notes for BIOL 1005 - General Biology with Lipscomb at Virginia Tech (VT)

Notes Information

Material Type:Vocab 16
Professor:Lipscomb
Class:BIOL 1005 - General Biology
Subject:Biological Sciences
University:Virginia Polytechnic Institute And State University
Term:Fall 2005
Keywords:
  • Geographical Isolation
  • Populations
  • Behavioral Isolation
  • Temporal Isolation
  • Interbreeding
  • Environmental Change
  • Either...or
  • Different Times
  • Allopatric Speciation
  • Environmental Conditions
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Sample Document Text

Chapter 16 Vocabulary 1. adaptive radiation - the rise of many new species in a relatively short time as a result of a single species that invades different habitats and evolves under different environmental pressures 2. allopatric speciation - speciation that occurs when two populations are separated by a physical barrier that prevents gene flow between them 3. biological species concept 4. Extinction - the death of all members of a species 5. isolating mechanism - a morphological, physiological, behavioral or ecological difference that prevents members of two species from interbreeding 6. Polyploidy - having more than two homologous chromosomes of each type 7. postmating isolating mechanism - any structure, physiological function, or developmental abnormality that prevents organisms of two different populations, once mating has occurred, from producing vigorous, fertile offspring 8. premating isolating mechanism - any structure, physiological function, or behavior that prevents organisms of two different ...

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