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5 Written questions

5 Matching questions

  1. Select the correct statement(s) about the genetics of behavior.
    Select all that apply.

    Behaviors with a genetic component can evolve through natural selection.
    Learned behaviors are not subject to genetic influence.
    Most behavioral traits are determined by a single gene.
  2. During exponential growth, a population always

    quickly reaches its carrying capacity.
    cycles through time.
    grows at its maximum per capita rate.
    loses some individuals to emigration.
    grows by thousands of individuals.
  3. This graph shows the effect of removal of urchins and limpets (alone and together) on seaweed cover. Select the statement that accurately describes the results shown in this graph.

    Sea urchins have a much greater effect than limpets in limiting seaweed cover.
    Removing only limpets increased seaweed cover dramatically.
    The lack of change over time in the control plots (with urchins and limpets present) shows that limpets and urchins have no effect on seaweed cover.
  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.
  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 grows at its maximum per capita rate.
  2. b Bacteria obtain energy from nitrification.
  3. c 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.
  4. d Sea urchins have a much greater effect than limpets in limiting seaweed cover.
  5. e Behaviors with a genetic component can evolve through natural selection.

5 Multiple choice questions

  1. moderate levels of disturbance.
  2. Dispersal occurs only on an evolutionary time scale.
  3. landscape ecology
  4. the cultural tradition of using stones to crack nuts has arisen in only some populations.
  5. Because plants cannot fix N2

5 True/False questions

  1. What is a likely outcome of a moderate disturbance, such as a severe thunderstorm?
    Select all that apply.

    Reduced species diversity within a community
    Patches of different habitats within the landscape
    Loss of an equilibrium state of balance, leading to a less healthy community
    an open ocean

          

  2. Your textbook states, "Like organisms, ecosystems are open systems." Which of the following provide a legitimate example to illustrate this statement?
    Select all that apply.

    A population of reef fishes with a high reproductive rate in a mangrove ecosystem may be a source of recruits for a population in an adjacent coral reef ecosystem with a lower reproductive rate.
    Detritivores in soil consume nonliving organic matter and make the nutrients available to plants.
    Earth's atmosphere is bombarded by about 1022 joules of solar radiation each day.
    A population of reef fishes with a high reproductive rate in a mangrove ecosystem may be a source of recruits for a population in an adjacent coral reef ecosystem with a lower reproductive rate.
    Earth's atmosphere is bombarded by about 1022 joules of solar radiation each day.

          

  3. The majority of young, inexperienced Western garter snakes born in the laboratory from mothers captured in coastal areas of California readily eat pieces of slug. What are plausible proximate explanations for this behavior?
    Select all that apply.

    Coastal snakes can detect odor molecules produced by banana slugs.
    Coastal snakes have a genetically acquired taste for banana slugs.
    Coastal snakes that readily eat banana slugs gain most of their calories from this prey species.
    when hair cells are bent against the tectorial membrane, causing them to depolarize and release neurotransmitter that stimulates sensory neurons

          

  4. Select the correct statement about the factors that limit the growth of a population.

    Density-dependent factors are biotic; density-independent factors are abiotic.
    The most important factor limiting population growth is the scarcest factor in that area.
    If a factor limits population growth, increasing its availability will increase population growth.
    Estimates of the global carrying capacity for the human population depend on resource use per capita.

          

  5. The observation that members of a population are uniformly distributed suggests that

    the members of the population are competing for access to a resource.
    the size of the area occupied by the population is increasing.
    resources are distributed unevenly.
    the members of the population are neither attracted to nor repelled by one another.
    the density of the population is low.
    the members of the population are competing for access to a resource.