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5 Written questions

5 Matching questions

  1. 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.
  2. Which statement about dispersal is false?

    Dispersal occurs only on an evolutionary time scale.
    Colonization of devastated areas after floods or volcanic eruptions depends on dispersal.
    Seeds are important dispersal stages in the life cycles of most flowering plants.
    Dispersal is a common component of the life cycles of plants and animals.
    The ability to disperse can expand the geographic distribution of a species.
  3. Nitrifying bacteria participate in the nitrogen cycle mainly by

    incorporating nitrogen into amino acids and organic compounds.
    converting ammonia to nitrogen gas, which returns to the atmosphere.
    converting nitrogen gas to ammonia.
    converting ammonium to nitrate, which plants absorb.
    releasing ammonium from organic compounds, thus returning it to the soil.
  4. Which of the following may result from resource partitioning?
    Select all that apply.

    A population's fundamental niche may be smaller than its realized niche.
    A population may have a smaller realized niche when it coexists with a competitor.
    Competing species may partition time, feeding at different times of day.
  5. Select the correct statement(s) about a terrestrial food chain.
    Select all that apply.

    The total biomass of the top trophic level is greatest because the top consumers are large.
    About 1% of the energy stored in producers is converted to organic matter at the secondary consumer level.
    Energy is transferred from decomposers to plants to herbivores to carnivores.
  1. a converting ammonium to nitrate, which plants absorb.
  2. b A population may have a smaller realized niche when it coexists with a competitor.
    Competing species may partition time, feeding at different times of day.
  3. c Dispersal occurs only on an evolutionary time scale.
  4. d 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. e About 1% of the energy stored in producers is converted to organic matter at the secondary consumer level.

5 Multiple choice questions

  1. Coastal snakes can detect odor molecules produced by banana slugs.
    Coastal snakes have a genetically acquired taste for banana slugs.
  2. vegetation demonstrating vertical layering
  3. moderate levels of disturbance.
  4. trophic structure
  5. adding nitrogen-fixing microorganisms to a degraded ecosystem to increase nitrogen availability

5 True/False questions

  1. Although many chimpanzees live in environments containing oil palm nuts, members of only a few populations use stones to crack open the nuts. The likely explanation is that

    members of different populations have different nutritional requirements.
    the cultural tradition of using stones to crack nuts has arisen in only some populations.
    members of different populations differ in manual dexterity.
    the behavioral difference is caused by genetic differences between populations.
    members of different populations differ in learning ability.
    A pyramid of biomass may be inverted because it is based on biomass at one point in time. Pyramids of net production are based on productivity per unit time.

          

  2. Which of the following could qualify as a top-down control on a grassland community?

    limitation of plant biomass by rainfall amount
    effect of humidity on plant growth rates
    effect of grazing intensity by bison on plant species diversity
    influence of temperature on competition among plants
    influence of soil nutrients on the abundance of grasses versus wildflowers
    effect of grazing intensity by bison on plant species diversity

          

  3. Which of the following areas of study focuses on the exchange of energy, organisms, and materials between ecosystems?

    population ecology
    organismal ecology
    landscape ecology
    community ecology
    ecosystem ecology
    the rate of decomposition in the ecosystem

          

  4. 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.

          

  5. Population ecologists follow the fate of same-age cohorts to

    determine if a population is regulated by density-dependent processes.
    determine if a population's growth is cyclic.
    determine the factors that regulate the size of a population.
    determine the birth rate and death rate of each group in a population.
    determine a population's carrying capacity.
    determine the birth rate and death rate of each group in a population.