Evolution Chapter 16: Species, Niche, Variation, and Adaptation
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What is the definition of a species?

  • An inherited trait that increases a population's chances of survival and reproduction
  • The variety and abundance of species that make up a biological community
  • Interbreeding populations of organisms that can produce healthy, fertile offspring (correct)
  • A habitat and the role a population plays in that habitat

    • What is the primary source of variation in a population?

  • Mutations (correct)
  • Crossing over
  • Combination of genes during fertilization
  • Independent assortment of chromosomes

    • What is the result of adaptation in a population?

  • A decrease in the number of species
  • A decrease in biodiversity
  • A decrease in variation
  • Populations becoming suited for specific niches (correct)

    • What occurs when the environment changes?

    <p>Habitats are destroyed and biodiversity decreases</p> Signup and view all the answers

    What is the definition of biodiversity?

    <p>The variety and abundance of species that make up a biological community</p> Signup and view all the answers

    What is the role of adaptation in a population?

    <p>To increase the chances of survival and reproduction</p> Signup and view all the answers

    What is the primary explanation for the distribution of fossils and living organisms worldwide?

    <p>The movement of continental plates</p> Signup and view all the answers

    What is the name of the process that describes the movement of solid continental plates above Earth's molten core?

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

    What is the approximate percentage of types of organisms that have gone extinct over time?

    <p>99%</p> Signup and view all the answers

    What is the term used to describe the preserved remains or imprints of ancient organisms?

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

    Why are fossils of Mesosaurus found in both South America and Africa?

    <p>Because South America and Africa were joined at one time</p> Signup and view all the answers

    How long does the Precambrian Time period represent on the 24-hour clock of Earth's history?

    <p>22 hours</p> Signup and view all the answers

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