Biology Quiz: Intoduction To Ecology!

37 Questions | Total Attempts: 222

SettingsSettingsSettings
Please wait...
Biology Quiz: Intoduction To Ecology!

.


Questions and Answers
  • 1. 
    If you initially trap and mark 40 iguana in the Sonoran Desert, release them, and later recapture 10 iguana – of which only 2 are marked – then what is the estimated size of the iguana population in this desert?  
    • A. 

      400

    • B. 

      800

    • C. 

      200

    • D. 

      100

    • E. 

      50

  • 2. 
    What type of survivorship curve is usually associated with organisms that have low mortality in the early stages of life?  
    • A. 

      Type I

    • B. 

      Type II

    • C. 

      Type III

    • D. 

      Type IV

    • E. 

      Type V

  • 3. 
    The maximum population size that a particular environment can support is symbolized by  _____.  
    • A. 

      Rmax

    • B. 

      K

    • C. 

      K – (N/K)

    • D. 

      DN/dt

    • E. 

      (K – N)/K

  • 4. 
    Logistic population growth is represented by dN/dt = _________.  
    • A. 

      RK [N-K/N]

    • B. 

      RN [(K - N)/K]

    • C. 

      RN-K [(K - N)/K]

    • D. 

      RN/[K-N]

    • E. 

      RN [(N - K)/N]

  • 5. 
    Which of the following best describes a species that exhibits iteroparous reproduction?  
    • A. 

      It exhibits “big bang” reproduction.

    • B. 

      It reproduces with the same mate every time, if possible.

    • C. 

      It reproduces with several mates per breeding season.

    • D. 

      It reproduces multiple times over the course of its lifetime.

    • E. 

      It can be an adaptation to a variable environment.

  • 6. 
    Which is true of carrying capacity?  
    • A. 

      it increases as the per capita growth rate decreases

    • B. 

      It remains constant over time

    • C. 

      It can never be exceeded

    • D. 

      It may change as environmental conditions change

    • E. 

      It can be calculated using the exponential growth model

  • 7. 
    Abiotic factors as well as biotic are considered more so when studying which type of ecological system?  
    • A. 

      A population

    • B. 

      A community

    • C. 

      An ecosystem

    • D. 

      A habitat

    • E. 

      A species' life history

  • 8. 
    In a population undergoing logistic growth, ____.   
    • A. 

      The death rate decreases as N gets close to K

    • B. 

      The population growth rate increases when N gets close to K

    • C. 

      DN/dt is minimized as N gets close to K

    • D. 

      The per capita rate of increase rises as N gets close to K

    • E. 

      The population grows exponentially when K is small

  • 9. 
    In a population undergoing exponential growth, _____.  
    • A. 

      Birth rates and death rates are equal

    • B. 

      The rate of population growth increases with added resources

    • C. 

      The number of individuals in a population has no effect on the rate of population growth

    • D. 

      The per capita rate of increase is constant

    • E. 

      The intrinsic rate of increase depends on the resource availability

  • 10. 
    Which of the following is an example of a biotic factor in ecological studies?  
    • A. 

      Soil acidity

    • B. 

      Solar radiation

    • C. 

      Salinity

    • D. 

      Density

    • E. 

      Precipitation

  • 11. 
    Which of the following is the most likely life-history that you would observe in a species?  
    • A. 

      A. production of many young annually over the course of a long lifetime

    • B. 

      B. production of few young in a single bout of reproduction per lifetime

    • C. 

      C. production of many young once and then dying

    • D. 

      D. choices A and B apply

    • E. 

      E. choices A and C apply

  • 12. 
    Which of the following would not contribute demographic data about a population of squirrels?  
    • A. 

      The type of food they eat

    • B. 

      The number of times they reproduce per year

    • C. 

      The average number of young born to mating pairs

    • D. 

      The number of individuals & their age

    • E. 

      The number of females as opposed to males

  • 13. 
    ______________ is not a density-dependent growth factor.  
    • A. 

      Food

    • B. 

      Nesting sites

    • C. 

      Fluctuations in weather

    • D. 

      Physiological responses to crowding

    • E. 

      Nutrient and mineral resources

  • 14. 
    Which of the following levels of organization is arranged in the correct sequence from most inclusive (i.e., broadest) to least inclusive?  
    • A. 

      Community, ecosystem, individual, population

    • B. 

      Individual, population, community, ecosystem

    • C. 

      Population, ecosystem, individual, community

    • D. 

      Ecosystem, community, population, individual

    • E. 

      Individual, community, population, ecosystem

  • 15. 
    In the logistic equation dN/dt = rN, ((K - N)/K), r is a measure of the population's intrinsic rate of increase. It is determined by which of the following?  
    • A. 

      A. death rate

    • B. 

      B. birth rate

    • C. 

      C. density

    • D. 

      D. A and B only

    • E. 

      E. A, B, and C

  • 16. 
    In models of sigmoidal (logistic) population growth, _______.  
    • A. 

      A) new individuals are added to the population most rapidly at intermediate population sizes.

    • B. 

      B) density-dependent factors affect the rate of population growth.

    • C. 

      C) population growth rate slows dramatically as N approaches K.

    • D. 

      D) All of the above are true.

    • E. 

      E) Only A and C are true.

  • 17. 
     The sum total of an organism's interaction with the biotic and abiotic resources of its environment is called its ________.  
    • A. 

      Biological potential

    • B. 

      Ecological niche

    • C. 

      Logistic growth

    • D. 

      Habitat

    • E. 

      Microclimax

  • 18. 
    Resource partitioning would be most likely to occur between ______.  
    • A. 

      Sympatric populations of species with similar ecological niches.

    • B. 

      Sympatric populations of a predator and its prey.

    • C. 

      Allopatric populations of species with similar ecological niches.

    • D. 

      Allopatric populations of the same animal species.

    • E. 

      Sympatric populations of a flowering plant and its specialized insect pollinator.

  • 19. 
    An insect that has evolved to resemble a plant twig will probably be able to avoid ______.  
    • A. 

      Parasitism

    • B. 

      Predation

    • C. 

      Symbiosis

    • D. 

      Commensalism

    • E. 

      Competition

  • 20. 
    Which of the following is an example of Batesian mimicry?  
    • A. 

      A butterfly that resembles a leaf

    • B. 

      An insect that resembles a twig

    • C. 

      A nonvenomous snake that looks like a venomous snake

    • D. 

      A fawn with fur coloring that camouflages it in the forest environment

    • E. 

      A snapping turtle that uses its tongue to mimic a worm, thus attracting fish

  • 21. 
    Which of the following is an example of aposematic coloration?  
    • A. 

      A katydid whose wings look like a dead leaf

    • B. 

      Eye color in humans

    • C. 

      Green color of a plant

    • D. 

      Colors of an insect-pollinated flower

    • E. 

      Stripes of a skunk

  • 22. 
    Dwarf mistletoes are flowering plants that grow on certain forest trees. They obtain nutrients and water from the vascular tissues of the trees. The trees derive no known benefits from the dwarf mistletoes and is not harmed by them. Which of the following best describes the interactions between dwarf mistletoes and trees?  
    • A. 

      facilitation

    • B. 

      Mutualism

    • C. 

      Parasitism

    • D. 

      Commensalism

    • E. 

      Competition

  • 23. 
    Which of the following are important biotic factors that can affect the structure and organization of biological communities?  
    • A. 

      Light intensity, seasonality

    • B. 

      Precipitation, wind

    • C. 

      Temperature, water

    • D. 

      Nutrient availability, soil pH

    • E. 

      Predation, competition

  • 24. 
    Which of the following would be most likely to exhibit uniform dispersion?  
    • A. 

      dwarf mistletoes, which parasitize particular species of forest trees

    • B. 

      Lake trout, which seek out deep water

    • C. 

      Cattails, which grow primarily at edges of lakes and streams

    • D. 

      Red squirrels, which hide food and actively defend territories

    • E. 

      A field of annual poppies

  • 25. 
    If you were to keep records on a cohort of wild animals for the purpose of developing a life table, you would be most successful if you chose to keep records on _______.  
    • A. 

      Wolves in a national park

    • B. 

      Earthworms in a backyard

    • C. 

      pelagic squid (pelagic = living throughout the open ocean)

    • D. 

      Migratory birds

    • E. 

      Mosquitoes

Back to Top Back to top