Mechanisms of Evolution in General Biology
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Questions and Answers

What is the term used to describe the difference in appearance between males and females of the same species?

  • Sexual selection
  • Natural selection
  • Reproductive success
  • Sexual dimorphism (correct)

    • In which type of sexual selection do the members of one sex (usually female) choose their mates from among multiple individuals of the opposite sex?

  • Reproductive success
  • Type 2 (correct)
  • Mutation
  • Type 1

    • Which type of sexual selection involves members of one sex (usually males) competing among themselves for access to the opposite sex?

  • Type 1 (correct)
  • Type 2
  • Reproductive success
  • Mutation

    • What is the term used to describe a change in an organism's DNA sequence that introduces a new allele to a population?

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

    Which of the following is not a mechanism of evolution mentioned in the text?

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

    Which type of sexual selection can lead to the development of distinctive structures, such as horns or antlers, in one sex?

    <p>Type 1</p> Signup and view all the answers

    What is the primary mechanism by which a population may gain or lose alleles?

    <p>Gene flow</p> Signup and view all the answers

    Which of the following statements about the effects of a mutation is correct?

    <p>A mutation can be harmful, neutral, or beneficial depending on how it affects the encoded protein.</p> Signup and view all the answers

    How does genetic drift differ from mutation in its effect on a population's diversity?

    <p>Genetic drift decreases diversity, while mutation increases diversity.</p> Signup and view all the answers

    Which type of genetic drift occurs when a small group of individuals leaves its home population and establishes a new, isolated settlement?

    <p>Founder effect</p> Signup and view all the answers

    What is required for a mutation to affect evolution, according to the text?

    <p>The mutation must be passed on to subsequent generations.</p> Signup and view all the answers

    What is the primary cause of the bottleneck effect in a population's genetic diversity?

    <p>A rapid decrease in population size</p> Signup and view all the answers

    How does non-random mating affect evolution, according to the text?

    <p>Non-random mating can change allele frequencies in a population.</p> Signup and view all the answers

    How does genetic drift differ from natural selection in its effect on a population's evolution?

    <p>Genetic drift is a random process, while natural selection is a directed process.</p> Signup and view all the answers

    Which of the following is NOT a mechanism of evolution?

    <p>Gene flow</p> Signup and view all the answers

    Which of the following is not mentioned in the text as a mechanism of evolution?

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

    How does mutation affect evolution in asexually reproducing organisms?

    <p>In asexually reproducing organisms, each mutated cell gives rise to mutant offspring if the mutation does not prevent reproduction.</p> Signup and view all the answers

    What is the main difference between mutation and non-random mating as mechanisms of evolution, according to the text?

    <p>Mutation requires the inheritance of the new trait, while non-random mating does not.</p> Signup and view all the answers

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