Topic 9 - Keystone Sample Quiz

10 Questions | Total Attempts: 647

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Topic 9 - Keystone Sample Quiz

Ecology


Questions and Answers
  • 1. 
    Young birds that have been raised in isolation from members of their species build nests characteristic of their species. This suggests that the nest-building behavior is
    • A. 

      Genetically inherited from parents

    • B. 

      Learned by watching members of their species

    • C. 

      A disadvantage to the survival of the species

    • D. 

      A direct result of the type of food the bird eats

  • 2. 
    A volcanic eruption destroyed a forest, covering the soil with volcanic ash. For many years, only small plants could grow. Slowly, soil formed in which shrubs and trees could grow. These changes are an example of
    • A. 

      Manipulation of genes

    • B. 

      Evolution of a species

    • C. 

      Ecological succession

    • D. 

      Equilibrium

  • 3. 
    A major reason that humans can have such a significant impact on an ecological community is that humans
    • A. 

      Can modify their environment through technology

    • B. 

      Reproduce faster than most other species

    • C. 

      Are able to increase the amount of finite resources available

    • D. 

      Remove large amounts of carbon dioxide from the air

  • 4. 
    Abandoned railroad tracks are overgrown with weeds. Ten years later there are small aspen trees growing in the middle of the tracks. This change is an example of
    • A. 

      Ecological succession

    • B. 

      Biological evolution

    • C. 

      Genetic variation

    • D. 

      Heterotrophic nutrition

  • 5. 
    Why is a mushroom considered a heterotroph?
    • A. 

      It manufactures its own food.

    • B. 

      It divides by mitosis.

    • C. 

      It transforms light energy into chemical energy.

    • D. 

      It obtains nutrients from its environment.

  • 6. 
    Decomposers are necessary in an ecosystem because they
    • A. 

      Produce food for plants by the process of photosynthesis

    • B. 

      Provide energy for plants by the process of decay

    • C. 

      Can rapidly reproduce and evolve

    • D. 

      Make inorganic materials available to plants

  • 7. 
    An energy pyramid is shown below. Which graph best represents the relative energy content of the levels of this pyramid?
    • A. 

      Graph 1

    • B. 

      Graph 2

    • C. 

      Graph 3

    • D. 

      Graph 4

  • 8. 
    The graph below represents the amount of available energy at successive nutrition levels in a particular food web. The Xs in the diagram represent the amount of energy that was most likely
    • A. 

      Changed into inorganic compounds

    • B. 

      Changed into organic compounds

    • C. 

      Recycled back to the producers

    • D. 

      Lost as heat to the environment

  • 9. 
    The diagram below represents an energy pyramid constructed from data collected from an aquatic ecosystem. Which statement best describes this ecosystem?
    • A. 

      The ecosystem is most likely unstable.

    • B. 

      Long-term stability of this ecosystem will continue.

    • C. 

      The herbivore populations will continue to increase in size for many years.

    • D. 

      The producer organisms outnumber the consumer organisms.

  • 10. 
    Two food chains are represented below. Decomposers are important for supplying energy for
    • A. 

      Food chain A, only

    • B. 

      Food chain B, only

    • C. 

      Both food chain A and food chain B

    • D. 

      Neither food chain A nor food chain B

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