Hybridization and Speciation
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Questions and Answers

What type of reproductive isolation prevents successful mating due to morphological differences?

  • Habitat isolation
  • Behavioral isolation
  • Hybrid breakdown
  • Mechanical isolation (correct)
  • Which type of prezygotic barrier involves different breeding times for species, preventing them from mixing their gametes?

  • Gametic isolation
  • Temporal isolation (correct)
  • Habitat isolation
  • Behavioral isolation
  • What is the term for the offspring of crosses between different species?

  • Isolates
  • Gametes
  • Viabilities
  • Hybrids (correct)
  • Which postzygotic barrier involves genes of different parent species interacting and impairing the hybrid's development or survival?

    <p>Reduced hybrid viability</p> Signup and view all the answers

    Which reproductive barrier is characterized by two species not mating due to unique courtship rituals and behaviors?

    <p>Behavioral isolation</p> Signup and view all the answers

    What is the term for the inability of hybrids to reproduce even if they are vigorous?

    <p>Reduced hybrid fertility</p> Signup and view all the answers

    What can drive sympatric speciation in cichlid fish in Lake Victoria?

    <p>Sexual selection</p> Signup and view all the answers

    What is an autopolyploid?

    <p>An individual with more than two chromosome sets derived from one species</p> Signup and view all the answers

    What is an allopolyploid?

    <p>An individual with multiple sets of chromosomes derived from different species</p> Signup and view all the answers

    What type of isolation restricts gene flow between populations in allopatric speciation?

    <p>Geographic isolation</p> Signup and view all the answers

    What results from matings between autopolyploids and diploids?

    <p>Reduced fertility</p> Signup and view all the answers

    What is a hybrid zone?

    <p>A region in which members of different species mate and produce hybrids</p> Signup and view all the answers

    What happens when some first-generation hybrids mate with another species or parent species in terms of their offspring?

    <p>Offspring of the next generation are feeble or sterile</p> Signup and view all the answers

    Which species concept cannot be applied to fossils or asexual organisms?

    <p>Biological species concept</p> Signup and view all the answers

    Which species concept defines a species by structural features?

    <p>Morphological species concept</p> Signup and view all the answers

    What does the ecological species concept emphasize about a species?

    <p>Its ecological niche</p> Signup and view all the answers

    What is speciation?

    <p>The process by which one species splits into two or more species</p> Signup and view all the answers

    How is a species defined under the phylogenetic species concept?

    <p>As the smallest group of individuals sharing a common ancestor</p> Signup and view all the answers

    How does the biological species concept define a species?

    <p>As a group of populations whose members can interbreed and produce viable, fertile offspring</p> Signup and view all the answers

    What is the relationship between microevolution and macroevolution?

    <p>Microevolution involves allele frequency changes within populations, while macroevolution considers evolutionary changes above the species level</p> Signup and view all the answers

    In which type of speciation is gene flow interrupted due to geographic isolation of subpopulations?

    <p>Allopatric speciation</p> Signup and view all the answers

    What does the gene flow contribute to in a species?

    <p>Maintains genetic diversity within populations</p> Signup and view all the answers

    Why do numerous concepts of species exist?

    <p>Due to different goals like taxonomy, understanding group formation, and evolutionary history</p> Signup and view all the answers

    What does the term 'species' mean in Latin?

    <p>Kind or appearance</p> Signup and view all the answers

    What term is used to describe periods of stasis in the fossil record?

    <p>Punctuated equilibria</p> Signup and view all the answers

    Which sunflower species originated from the hybridization of two other sunflower species?

    <p>Helianthus anomalus</p> Signup and view all the answers

    In Japanese Euhadra snails, what is controlled by a single gene?

    <p>Shell spiral direction</p> Signup and view all the answers

    What factor influences pollinator preference in monkey flowers (Mimulus)?

    <p>Flower color</p> Signup and view all the answers

    How long can the interval between speciation events range, based on the text?

    <p>40 million years</p> Signup and view all the answers

    What does macroevolution represent?

    <p>Cumulative effect of both speciation and extinction events</p> Signup and view all the answers

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