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5 Written questions

5 Matching questions

  1. The feeding relationships among the species in a community determine the community's

    species richness.
    secondary succession.
    trophic structure.
    species-area curve.
    ecological niche.
  2. A female zebra finch reared by a father with a red feather taped to his head will select a mate with a similar ornament over an unornamented male. What are plausible ultimate explanations for this behavior?
    Select all that apply.

    A female zebra finch that chooses a mate that resembles her father is more likely to choose a mate from her own species.
    A female zebra finch learns to recognize suitable mates by observing her father.
    Zebra finches are able to perceive ornamentation on other birds.
  3. Which of the following would be considered an example of bioremediation?

    reconfiguring the channel of a river
    using a bulldozer to regrade a strip mine
    adding seeds of a chromium-accumulating plant to soil contaminated by chromium
    dredging a river bottom to remove contaminated sediments
    adding nitrogen-fixing microorganisms to a degraded ecosystem to increase nitrogen availability
  4. In Australia, researchers tested the hypothesis that sea urchin abundance limits kelp distribution. Select the evidence that offers the best support for this hypothesis.

    There is an inverse relationship between the abundance of sea urchins and the abundance of kelp.
    When sea urchins were removed from experimental plots, kelp cover increased.
    Sea urchins graze on kelp.
  5. Select the correct statement describing the nitrogen cycle.

    Nitrogen-fixing microbes provide energy for carbon fixation.
    Denitrifying bacteria reduce ammonia (NH3 +) to molecular nitrogen (N2).
    Bacteria obtain energy from nitrification.
  1. a trophic structure
  2. b A female zebra finch that chooses a mate that resembles her father is more likely to choose a mate from her own species.
  3. c adding nitrogen-fixing microorganisms to a degraded ecosystem to increase nitrogen availability
  4. d When sea urchins were removed from experimental plots, kelp cover increased.
  5. e Bacteria obtain energy from nitrification.

5 Multiple choice questions

  1. loud and faint
  2. winds blowing from west to east along the equator.
  3. air pressure waves to fluid pressure waves.
  4. Eutrophic lakes are richer in nutrients.
  5. an open ocean

5 True/False questions

  1. In ecological terms, disturbance is an event such as a storm, fire, or human activity that changes a community, removing organisms and altering resource availability. Which of the following statements about the effects of disturbance is correct?

    A healthy community is in an equilibrium state of balance, with few disturbances.
    The effects of disturbance on a community are almost always negative.
    Disturbances can create patches of different habitats in a community.
    Disturbances can create patches of different habitats in a community.

          

  2. According to the logistic growth equation

    the birth rate (b) approaches zero as N approaches K.
    the population grows exponentially when K is small.
    population growth is zero when N equals K.
    the number of individuals added per unit time is greatest when N is close to zero.
    the per capita growth rate (r) increases as N approaches K.
    natural selection favors altruistic acts when the resulting benefit to the beneficiary, corrected for relatedness, exceeds the cost to the altruist.

          

  3. Which of the following statements about human population in industrialized countries is incorrect?

    The survivorship curve is Type I.
    Average family size is relatively small.
    Age distribution is relatively uniform.
    The population has undergone the demographic transition.
    Life history is r-selected.
    Eutrophic lakes are richer in nutrients.

          

  4. In cross-fostering studies, the young of one species are placed in the care of adults from another species. In broad terms, what do researchers learn from such studies?
    Select all that apply.

    Changes in the behavior of cross-fostered young provide information about how the social and physical environment influences behavior.
    Cross-fostering studies provide information about the relative importance of nature and nurture in the development of a trait.
    Cross-fostering studies provide information about the evolutionary relationship between the two species.
    Changes in the behavior of cross-fostered young provide information about how the social and physical environment influences behavior.
    Cross-fostering studies provide information about the relative importance of nature and nurture in the development of a trait.

          

  5. Graylag goslings imprint on a nearby object that moves away from them during a sensitive period in the first few hours after they hatch, and follow the object steadfastly from that time on. What is the adaptive value of this behavior?

    This behavior is not adaptive because goslings may imprint on objects other than their parents.
    This behavior is likely to increase gosling survival.
    This behavior is genetic.
    This behavior is likely to increase gosling survival.

          

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