Unit 6: Populations and Natural Selection - Darwin's Theory of Evolution
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Questions and Answers

What is the definition of a theory?

  • A well-supported explanation of observations by repeatedly testing and confirming through experimentation (correct)
  • A random guess about how things work
  • A hypothesis that has not been tested yet
  • A fact that is proven to be true without any doubt

    • What did Charles Darwin theorize about organisms?

  • They remain the same forever
  • They come from different planets
  • They only evolve in human-made environments
  • They change over time (correct)

    • What is fitness in the context of natural selection?

  • The color of an organism's fur
  • The physical strength of an organism
  • The speed at which an organism can run
  • An organism’s ability to survive and produce fertile offspring (correct)

    • How did Darwin's observations on the Galápagos Islands contribute to his theory of natural selection?

    <p>By noticing that plant and animals differed on different islands</p> Signup and view all the answers

    According to Darwin, why do some individuals have more success in survival and reproduction?

    <p>Due to variations in the population that give them advantageous traits</p> Signup and view all the answers

    How did giraffes with longer necks have an advantage in Darwin's theory of natural selection?

    <p>&quot;Leaves became scarce, introducing a 'struggle for existence'&quot;</p> Signup and view all the answers

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