Understanding Relative Fitness
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Questions and Answers

Which mode of natural selection occurs when conditions favor individuals at one end of the phenotypic range?

  • Random selection
  • Stabilizing selection
  • Directional selection (correct)
  • Disruptive selection

    • Which mode of natural selection occurs when conditions favor individuals at both extremes of the phenotypic range?

  • Stabilizing selection
  • Random selection
  • Disruptive selection (correct)
  • Directional selection

    • Which mode of natural selection occurs when conditions favor intermediate variants and act against extreme phenotypes?

  • Random selection
  • Directional selection
  • Disruptive selection
  • Stabilizing selection (correct)

    • What is the main role of natural selection in adaptive evolution?

    <p>To increase the frequencies of alleles that enhance survival and reproduction</p> Signup and view all the answers

    What is an example of a striking adaptation that has arisen through natural selection?

    <p>The ability of certain octopuses to change color rapidly for camouflage</p> Signup and view all the answers

    What is the function of the movable bones in the upper jaw of snakes?

    <p>To allow them to swallow food larger than their head</p> Signup and view all the answers

    What happens to the overall makeup of the population in directional selection?

    <p>It shifts by favoring variants at one extreme of the distribution</p> Signup and view all the answers

    What happens to the overall makeup of the population in disruptive selection?

    <p>It shifts by favoring variants at both extremes of the distribution</p> Signup and view all the answers

    What happens to the overall makeup of the population in stabilizing selection?

    <p>It remains the same</p> Signup and view all the answers

    What is the result of disruptive selection in a population of mice living among light and dark rocks?

    <p>Mice of an intermediate color are selected against</p> Signup and view all the answers

    Which phrase is misleading in the context of reproductive success?

    <p>Direct competition among individuals</p> Signup and view all the answers

    What does relative fitness refer to?

    <p>The contribution an individual makes to the gene pool of the next generation</p> Signup and view all the answers

    How does reproductive success depend on food collection ability?

    <p>Individuals with better food collection ability have higher reproductive success</p> Signup and view all the answers

    What does selection indirectly favor in terms of genotypes and phenotypes?

    <p>Selection indirectly favors certain genotypes by acting directly on phenotypes</p> Signup and view all the answers

    Which phrase accurately describes reproductive success?

    <p>Reproductive success depends on various factors</p> Signup and view all the answers

    What is the main focus of relative fitness?

    <p>The contribution an individual makes to the gene pool of the next generation</p> Signup and view all the answers

    How does food collection ability impact reproductive success?

    <p>Individuals with better food collection ability have higher reproductive success</p> Signup and view all the answers

    What does the term 'survival of the fittest' imply?

    <p>Direct competition among individuals</p> Signup and view all the answers

    What is the relationship between reproductive success and genetic factors?

    <p>Genetic factors can influence reproductive success</p> Signup and view all the answers

    How does selection indirectly favor certain genotypes?

    <p>Selection indirectly favors certain genotypes by acting directly on phenotypes</p> Signup and view all the answers

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