Chapter 23 Microevolution: The Smallest Unit of Evolution
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Questions and Answers

What is a common misconception about evolution?

  • Individual organisms do not evolve at all
  • Evolution only occurs in populations
  • Evolution only occurs in individual organisms (correct)
  • Natural selection acts on populations, not individuals

    • What is the smallest unit of evolution?

  • Populations (correct)
  • Communities
  • Individual organisms
  • Species

    • During a drought, which type of birds were more likely to survive?

  • All types of birds had equal chances of survival
  • Small-beaked birds
  • Medium-beaked birds
  • Large-beaked birds (correct)

    • In the context of the population of medium ground finches on Daphne Major Island, what evolved during the drought?

    <p>The finch population evolved</p> Signup and view all the answers

    What is the main focus of evolution according to the text?

    <p>Population dynamics</p> Signup and view all the answers

    In the context of natural selection, what is the role of individuals and populations?

    <p>Populations adapt, while individuals remain static</p> Signup and view all the answers

    What is the main focus of microevolution according to the provided text?

    <p>Change in allele frequencies in a population over generations</p> Signup and view all the answers

    Which of the following mechanisms consistently causes adaptive evolution?

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

    What is a prerequisite for evolution by natural selection?

    <p>Genetic variation</p> Signup and view all the answers

    How can genetic variation be measured as per the information provided?

    <p>Gene variability and nucleotide variability</p> Signup and view all the answers

    What rarely results in phenotypic variation?

    <p>Nucleotide variability</p> Signup and view all the answers

    Which process can result in the formation of new genes and alleles?

    <p>Mutation and gene duplication</p> Signup and view all the answers

    What is a point mutation?

    <p>A change in a single nucleotide in a DNA sequence</p> Signup and view all the answers

    What is the main role of natural selection?

    <p>Acting on variation with a genetic component</p> Signup and view all the answers

    'Variations that occur in coding regions (exons) rarely change the amino acid sequence of the encoded protein' refers to which genetic concept?

    <p><code>Synonymous mutations</code></p> Signup and view all the answers

    'Some phenotypic differences are determined by a single gene and can be classified on an 'either-or' basis' refers to which type of inheritance?

    <p>Mendelian inheritance</p> Signup and view all the answers

    What is the product of inherited genotype and environmental influences?

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

    What does natural selection act upon?

    <p>Variation with a genetic component</p> Signup and view all the answers

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