Ecology Population Dynamics Quiz
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Questions and Answers

Which of the following best defines a population?

  • All abiotic factors in an ecosystem
  • Same species in the same place at the same time (correct)
  • Different species living together
  • All organisms in a specific area

    • The biosphere includes only living organisms.

    False

    What is biotic potential?

    Maximum reproductive capacity of a species under ideal conditions.

    The pattern of spacing within geographic boundaries of a population is known as __________.

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

    Which type of dispersion is characterized by individuals being unevenly distributed, usually due to uneven resources?

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

    Match the following types of dispersion with their descriptions:

    <p>Uniform = Evenly spaced individuals Random = Unpredictable spacing Clumped = Grouped around resources</p> Signup and view all the answers

    A community includes abiotic factors such as soil and temperature.

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

    Give an example of a population.

    <p>The number of squirrels on NC State’s campus.</p> Signup and view all the answers

    What is the primary characteristic of exponential growth?

    <p>Population grows at maximum rate</p> Signup and view all the answers

    Exponential growth is commonly seen in natural populations without any checks.

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

    What formula is used to calculate the growth rate (r) of a population?

    <p>r = ΔN/ΔT</p> Signup and view all the answers

    When a population grows infinitely due to perfect conditions, it is referred to as __________ growth.

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

    Match the following terms with their definitions:

    <p>Doubling Time = Time required for a population to double in size Biotic Potential = Maximum reproductive capacity of a population Limiting Factors = Environmental constraints affecting population growth Zero Population Growth = Condition where a population's size remains stable</p> Signup and view all the answers

    Which of the following statements is true regarding the growth rate (r)?

    <p>r is negative if the population is declining</p> Signup and view all the answers

    Doubling time is calculated by dividing 70 by the percent increase in population per year.

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

    What term describes factors that prevent a population from reproducing and growing?

    <p>limiting factors</p> Signup and view all the answers

    Which of the following is a characteristic of 'K' selected species?

    <p>Few offspring produced at a time</p> Signup and view all the answers

    Density independent factors limit population growth only when the population density is high.

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

    What is the term for the maximum number of individuals that an environment can sustain indefinitely?

    <p>carrying capacity</p> Signup and view all the answers

    The type of growth that fluctuates around the carrying capacity is called __________ growth.

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

    Match the following factors to their corresponding types:

    <p>Predation = Density Dependent Flooding = Density Independent Starvation = Density Dependent Natural Disaster = Density Independent</p> Signup and view all the answers

    Which of the following statements about 'R' selected species is true?

    <p>They often reproduce in unpredictable environments.</p> Signup and view all the answers

    Overshooting the carrying capacity can lead to population collapse due to limiting factors.

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

    What is one of the main features of density dependent factors?

    <p>They limit population growth as the population density increases.</p> Signup and view all the answers

    Which survivorship curve describes species that have a high likelihood of surviving to old age?

    <p>Type I</p> Signup and view all the answers

    Demographic transition refers to the shift from high birth and death rates to low rates.

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

    What typically characterizes the age structure of a populations with rapid growth?

    <p>A large number of individuals in younger age groups.</p> Signup and view all the answers

    Type ___ survivorship curve has a constant mortality rate throughout the organism's life span.

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

    Match the demographic concepts with their definitions:

    <p>Pre-Industrial = High Birth and Death Rates Early Industrial = High Birth Rate, Death Rate begins decreasing Mature Industrial = Birth Rate begins decreasing, Death Rate is Low Post Industrial = Both Low Birth and Death Rates</p> Signup and view all the answers

    Which type of society typically has a higher birth rate due to children being seen as assets?

    <p>Agrarian Society</p> Signup and view all the answers

    The ecological footprint measures how many individuals are in a population.

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

    What is the primary characteristic of Type III survivorship curve?

    <p>Most individuals die early in life.</p> Signup and view all the answers

    What is the term for the actual resources available to an organism in its environment?

    <p>Realized niche</p> Signup and view all the answers

    Resource partitioning allows species to share resources without competing directly.

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

    What process occurs when natural selection favors traits that decrease competition between species?

    <p>Character Displacement</p> Signup and view all the answers

    Barnacles on a rocky shore can occupy different positions on the rock due to the absence of __________ from other species.

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

    Match the following terms with their definitions:

    <p>Realized Niche = Resources actually available to an organism Resource Partitioning = Dividing resources among species to coexist Character Displacement = Evolution of traits to reduce competition Sympatric environments = Living in the same environment and evolving differently</p> Signup and view all the answers

    Which of the following is an example of resource partitioning?

    <p>Birds foraging at different levels of a tree canopy</p> Signup and view all the answers

    Character displacement is more likely to occur in allopatric environments than in sympatric environments.

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

    What is the main advantage of resource partitioning in an ecosystem?

    <p>It reduces direct competition among species.</p> Signup and view all the answers

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