Cohort Studies and Survivorship Curves Quiz
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Questions and Answers

Which of the following best describes species distribution?

  • The movement of individuals away from an area of origin
  • The spatial arrangement of species that have dispersed (correct)
  • The evolutionary history of a species
  • The factors that dictate the distribution of species

    • What is the fundamental question of ecologists regarding species distribution?

  • Where do species occur?
  • Why do species occur in a certain area? (correct)
  • How do species disperse?
  • What are the ecological factors that dictate species distribution?

    • What is dispersal in ecology?

  • The movement of individuals away from an area of origin (correct)
  • The spatial arrangement of species that have dispersed
  • The evolutionary history of a species
  • The factors that dictate the distribution of species

    • What can be a limitation to dispersal?

    <p>Physical barriers</p> Signup and view all the answers

    What helps to explain patterns of species distribution?

    <p>Molecular evidence</p> Signup and view all the answers

    Where are kangaroos primarily found?

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

    Which type of interaction is described as a general term for any +/- interaction where one species benefits by feeding on another species?

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

    What type of coloration deters predators through warning or bright coloration?

    <p>Aposematic coloration</p> Signup and view all the answers

    What type of interaction involves one species killing and eating another species?

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

    Which type of interaction involves one species benefiting while the other is not harmed?

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

    What type of interaction occurs when both species benefit from the interaction?

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

    What is the term for the number of species present in a community?

    <p>Species richness</p> Signup and view all the answers

    Which type of community is more resistant to invasive species?

    <p>Communities with high species diversity</p> Signup and view all the answers

    What is the role of dominant species in a community?

    <p>They are the most abundant or have the highest biomass</p> Signup and view all the answers

    Which species have a pivotal role or niche in a community?

    <p>Keystone species</p> Signup and view all the answers

    What is the term for species that dramatically alter their environment?

    <p>Ecosystem engineers</p> Signup and view all the answers

    Which type of control occurs when a lower trophic level affects the community structure of higher trophic levels by means of resource restriction?

    <p>Bottom-up control</p> Signup and view all the answers

    What does the top-down model postulate about community organization?

    <p>Predation controls community organization because predators control herbivores</p> Signup and view all the answers

    Which of the following is a characteristic of Type I survivorship curve?

    <p>Flat at the start and during mid-life, then drops steeply among older age groups</p> Signup and view all the answers

    What is the ecological niche of an organism?

    <p>The specific set of biotic and abiotic resources that an organism uses in its environment</p> Signup and view all the answers

    What is the carrying capacity of a population?

    <p>The maximum population size that a particular environment can sustain</p> Signup and view all the answers

    What is competitive exclusion?

    <p>When two species in a community compete for a limited resource and one species has a competitive edge, leading to the exclusion of the other species</p> Signup and view all the answers

    What are interspecific interactions?

    <p>Interactions between individuals of two different species</p> Signup and view all the answers

    How is a life table constructed?

    <p>By calculating the proportion of a cohort that survives from one age group to the next</p> Signup and view all the answers

    Which of the following is NOT an abiotic factor that affects dispersal?

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

    Which of the following is an example of a fundamental niche?

    <p>A species that can survive in a wide range of abiotic conditions</p> Signup and view all the answers

    Which of the following is NOT a biotic factor that affects dispersal?

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

    What are the two most important abiotic factors that limit species distribution?

    <p>Temperature and moisture</p> Signup and view all the answers

    What is the density of a population?

    <p>The number of individuals per unit area or volume</p> Signup and view all the answers

    What is the mark-recapture method used for?

    <p>Estimating the size of a population</p> Signup and view all the answers

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