bio final

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bio final
2012-12-11 17:51:52
bio final

bio final
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  1. a change in a population's gene pool over a succession of generations; evolutionary changes in species over relatively brief periods of geologic time
  2. evolutionary change above the species level, including the origin of evolutionary novelty and new taxonomic groups and the impact of mass extinctions on the diversity of life and its subsequent recovery
  3. the formation of a new species in populations that are geographically isolated from one another
    allopatric speciation
  4. the formation of a new species in populations that live in the same geographic area
    sympatric speciation
  5. a reproductive barrier that impedes mating between species or hinders fertilization of eggs if members of different species attempt to mate
    prezygotic barrier
  6. what are the five types of prezygotic barriers?ani
    temporal isolation, habitat isolation,behavioral isolation,mechanical isolation,gametic isolation
  7. mating or fertilization occurs at different seasons or times of day
    temporal isolation
  8. populations live in different habitats and do not meet
    habitat isolation
  9. little or no sexual attraction exists between populations
    behavioral isolation
  10. structural differences prevent fertilization
    gametic isolation
  11. a reproductive barrier that operates if interspecies mating occurs and forms hybrid zygotes
    postzygotic barrier
  12. what are the postzygotic barriers
    reduced hybrid viability,reduced hybrid fertility,hybrid breakdown
  13. hybrid zygotes fail to develop or fail to reach sexual maturity
    reduced hybrid viability
  14. hybrids fail to produce functional gametes
    reduced hybrid fertility
  15. hybrids are feeble or sterile
    hybrid breakdown
  16. what are the two patterns of the pace speciation?
    punctuated pattern, gradual pattern
  17. a new species changes most as it first branches from a parent species. After this speciation episode,there is little changes for the rest of the species' existence
    punctuated pattern
  18. species that are descended from a common ancestor diverge gradually in form as they acquire unique adaptations
    gradual pattern
  19. what are the levels for naming a species?
  20. the scientific study of the interactions between organisms and their environment
  21. a nonliving component of an ecosystem,such as air,water, light,minerals,or temperature  
    abiotic factor
  22. a living component of a biological community;any organism that is part of an individual's environment
    biotic factor
  23. what are the four levels of ecology?
    organismal, population, community and ecosystem
  24. concentrates mainly on factors that affect population density and growth
    population ecology
  25. concerned with the evolutionary adaptations that enable organisms to meet the challenges posed by their abiotic environment
    organismal ecology
  26. consists of all the organisms that inhabit a particular are; it is an assemblage of populations of different species
    community ecology
  27. includes all the abiotic factors in addition to the community of species in a certain are
  28. a place where an organism lives;a specific environment in which an organism livesbita
  29. an ecosystem intermediate between an aquatic ecosystem and a terrestrial ecosystem.Wetland soil is saturated with water permanently or periodically.
  30. the area where a freshwater stream or river merges with seawater
  31. the number of individuals of a species per unit area or volume of the habitat
    population density
  32. the maxiumum population size that a particular environment can sustain
    carrying capacity
  33. the feeding relationship among the various species in a community
    trophic struture