Lamarck's Evolution Theories
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Questions and Answers

What is the primary reason suggested for the survival of long-necked giraffes?

  • Their stronger resistance to diseases affecting shorter-necked giraffes
  • Their increased speed in running from predators
  • Their ability to reach food on tall trees when low vegetation is scarce (correct)
  • Their natural camouflage against predators in tall grass

    • Which of the following best describes gene flow?

  • The movement of genes from one population to another due to migration and interbreeding (correct)
  • The random change in gene frequencies within a population over time
  • The process by which organisms with favorable traits are more likely to survive
  • The change in gene frequencies due to mutations in the population

    • What is the primary focus of the synthetic theory (neo-Darwinian synthesis)?

  • The explanation of how natural selection acts on genetic variations within populations
  • The study of genetic mechanisms and reevaluation of fossil records
  • The combination of Darwin's theory of evolution and Mendel's principles of genetics (correct)
  • The understanding of how mutations contribute to the diversity of organisms

    • Which of the following is NOT a condition required for the Hardy-Weinberg equilibrium?

    <p>Presence of natural selection acting on the population</p> Signup and view all the answers

    Which of the following best defines natural selection?

    <p>The process by which nature selects organisms based on their existing traits</p> Signup and view all the answers

    What is the primary cause of genetic drift?

    <p>Random changes in gene frequencies due to chance events</p> Signup and view all the answers

    What was the key difference between Lamarck's and Darwin's theories of evolution?

    <p>Lamarck believed in the inheritance of acquired characteristics, while Darwin believed in natural selection.</p> Signup and view all the answers

    According to Lamarck's Theory of Use and Disuse, what happens to organs that are constantly used?

    <p>They will become larger and more developed.</p> Signup and view all the answers

    What is the main idea behind Lamarck's Theory of Need?

    <p>Organisms change in response to their own needs.</p> Signup and view all the answers

    What was the key difference between the giraffes' neck lengths in Lamarck's and Darwin's theories of evolution?

    <p>Lamarck believed the giraffes' long necks were acquired through use, while Darwin believed they were the result of natural selection.</p> Signup and view all the answers

    What is the meaning of the word "evolve" according to the text?

    <p>To change gradually.</p> Signup and view all the answers

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