Evolution Theories contributing to Darwin's Descent with Modification
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Questions and Answers

What do homologous structures share?

  • Similar functions
  • Similar embryonic origin (correct)
  • Different embryonic origin
  • Different functions

    • What does biogeography provide evidence of?

  • Extinction of species
  • Origin of new groups
  • Changes within groups overtime
  • All of the above (correct)

    • What is the main function of vestigial structures?

  • Serve important functions in the organism's ancestors (correct)
  • Share similar functions with analogous structures
  • Perform vital functions in the current organism
  • Have no function in the current organism

    • Why is genetic variation a necessity for evolutionary change?

    <p>To allow populations to evolve in response to changing environmental variables</p> Signup and view all the answers

    What did Lamarck's hypothesis propose?

    <p>Organisms changed their behavior in response to environmental change, which modified their organs and their offspring inherited those changes</p> Signup and view all the answers

    What did Darwin observe about species from South America and the Galápagos Islands?

    <p>They resembled living species from the same region and other species from nearby regions, leading him to hypothesize about colonization and speciation</p> Signup and view all the answers

    What is the main difference between natural selection and artificial selection?

    <p>Natural selection increases the adaptation of organisms to their environment over time, while artificial selection involves humans modifying other species through breeding for desired traits</p> Signup and view all the answers

    What does the theory of evolution by natural selection primarily emphasize?

    <p>Adaptation of organisms to their environment through natural selection, leading to the origin of new species</p> Signup and view all the answers

    What is the principle of uniformitarianism?

    <p>The mechanisms of change are constant over time</p> Signup and view all the answers

    What is homology?

    <p>Structural or molecular similarities in related species, often different in function but similar in structure</p> Signup and view all the answers

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