Evolution at Different Scales: Character Change in Trilobites
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Questions and Answers

What does stasis refer to in the context of macroevolution?

  • Partial change in lineages over time
  • Rapid change in lineages over time
  • Random changes in lineages over time
  • No change in lineages over time (correct)

    • Which macroevolutionary pattern involves significant changes in the characteristics of species over time?

  • Stasis
  • Speciation
  • Character Change (correct)
  • Extinction

    • What is the term for the production of new species from existing ones?

  • Extinction
  • Character Change
  • Stasis
  • Speciation (correct)

    • Which macroevolutionary pattern involves the disappearance of entire lineages or groups of organisms?

    <p>Extinction</p> Signup and view all the answers

    In macroevolution, what characterizes 'living fossils' like the Coelacanth?

    <p>No change in traits over time</p> Signup and view all the answers

    Which macroevolutionary pattern involves the creation of new traits or features in species?

    <p>Character Change</p> Signup and view all the answers

    What is an example of character change mentioned in the text?

    <p>Evolving additional segments</p> Signup and view all the answers

    Which term is used to describe lineage-splitting in evolution?

    <p>Speciation</p> Signup and view all the answers

    What is the significance of constructing and examining a phylogeny in evolutionary studies?

    <p>Identifying patterns in macroevolution</p> Signup and view all the answers

    How can extinction be avoided according to the text?

    <p>Introduction of nonnative/invasive species</p> Signup and view all the answers

    What percentage of species that have existed on Earth are estimated to have gone extinct?

    <p>&gt;99%</p> Signup and view all the answers

    Which factor is NOT listed as a cause of extinction in the text?

    <p>Increased genetic diversity</p> Signup and view all the answers

    What is microevolution defined as?

    <p>Genetic change at a population or below species level</p> Signup and view all the answers

    In microevolution, what does gene frequency represent?

    <p>The prevalence of specific alleles in the gene pool</p> Signup and view all the answers

    What is an example of microevolution?

    <p>Increase in gene frequency for brown coloration in beetles</p> Signup and view all the answers

    Which term describes long-term changes above the species level?

    <p>Speciation</p> Signup and view all the answers

    What is macroevolution primarily concerned with?

    <p>Changes that affect lineages and the appearance of organisms</p> Signup and view all the answers

    Which concept is associated with macroevolution?

    <p>Mass extinctions affecting multiple species</p> Signup and view all the answers

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