FEU High School | General Biology 2: Patterns of Descent with Modification
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Questions and Answers

What did Darwin coin the phrase 'descent with modification' to describe?

  • The diverse species documented in the fossil record
  • The gradual changes from an ancestral type (correct)
  • The common ancestor shared by all life on Earth
  • The process of evolution on the Galápagos Islands

    • What did Darwin think had happened to the finch species on the Galápagos Islands?

  • They had always been distinct species on the different islands
  • They had evolved from a single ancestral type of finch (correct)
  • They had been introduced by humans to the islands
  • They had descended from multiple ancestral types of finches

    • How did the finch population on the Galápagos Islands change over time?

  • They were unaffected by the resources on each island
  • They gradually branched in several directions, with different groups eating different food (correct)
  • They remained unchanged, as they were already adapted to the different islands
  • They became less diverse, as the finches on different islands interbred

    • What did Darwin also note changes in, besides the finch species on the Galápagos?

    <p>The tortoise species on the Galapagos Islands</p> Signup and view all the answers

    Where did Darwin get the idea of natural selection from?

    <p>From thinking about artificial selection (also called selective breeding)</p> Signup and view all the answers

    What is the main concept that the text discusses in relation to Darwin's theory of evolution?

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

    What is evolution defined as?

    <p>A genetic change in a population over multiple generations</p> Signup and view all the answers

    What does 'descent with modification' mean in the context of evolution?

    <p>Individuals descend from a common ancestor and acquire new traits over time</p> Signup and view all the answers

    How is evolution detectable in a population?

    <p>By examining a population's gene pool and allele frequencies</p> Signup and view all the answers

    In the example provided with lions, tigers, and leopards, what does it demonstrate about evolution?

    <p>That new species can arise from a single ancestral species</p> Signup and view all the answers

    How is an allele's frequency calculated in a population?

    <p>By calculating the number of copies of an allele divided by the total number of alleles in the population</p> Signup and view all the answers

    What do the terms 'descent' and 'modification' refer to in the context of evolution?

    <p>'Descent' implies inheritance and 'modification' refers to changes in traits over generations</p> Signup and view all the answers

    What provided Charles Darwin with evidence for evolution?

    <p>His voyage to the Galapagos Islands</p> Signup and view all the answers

    How long did Darwin's voyage on the HMS Beagle last?

    <p>5 years</p> Signup and view all the answers

    Which of the following is NOT a pattern of descent with modification?

    <p>Species becoming extinct</p> Signup and view all the answers

    What is the frequency of the 'a' allele in a population of 50 diploid individuals, if there are 8 'a' alleles?

    <p>0.16</p> Signup and view all the answers

    How does evolution occur, according to the text?

    <p>In populations</p> Signup and view all the answers

    What is the mechanism of evolution described in the text?

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

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