Unit 2 Quiz: Ecology

21 Questions | Total Attempts: 75

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Unit 2 Quiz: Ecology

Questions and Answers
  • 1. 
    An organism that uses energy to produce its own food supply from inorganic compounds is called a(an)
    • A. 

      Heterotroph.

    • B. 

      Consumer.

    • C. 

      Decomposer.

    • D. 

      Autotroph.

  • 2. 
    All the interconnected feeding relationships in an ecosystem make up a food
    • A. 

      Interaction.

    • B. 

      Chain.

    • C. 

      Pyramid.

    • D. 

      Web.

  • 3. 
    What animals eat both producers and consumers?
    • A. 

      Herbivores

    • B. 

      Omnivores

    • C. 

      Carnivores

    • D. 

      Autotrophs

  • 4. 
    The first trophic level of any ecosystem is occupied by organisms such as
    • A. 

      Lions, wolves, and snakes.

    • B. 

      Humans, bears, and pigs.

    • C. 

      Cows, horses, and caterpillars.

    • D. 

      Plants, bacteria, and algae.

  • 5. 
    Approximately 10% of the energy absorbed by one trophic level is transferred to the next successive level. The same number of calories are available at the primary producer level of each of these food chains. Food Chain 1:   phytoplankton --> zooplankton --> smelt --> trout --> humans Food Chain 2:   phytoplankton --> smelt --> humans How much energy is available to humans in Food Chain 2 as compared to the energy available to humans in Food Chain 1?
    • A. 

      10 times less energy

    • B. 

      100 times less energy

    • C. 

      10 times more energy

    • D. 

      100 times more energy

  • 6. 
    Approximately 10% of the energy absorbed by one trophic level is transferred to the next successive level. The same number of calories are available at the primary producer level of each of these food chains. Food Chain 1:   phytoplankton --> zooplankton --> smelt --> trout --> humans Food Chain 2:   phytoplankton --> smelt --> humans What is the trophic level for the zooplankton in Food Chain 1?
    • A. 

      Tertiary consumer

    • B. 

      Producer

    • C. 

      Secondary consumer

    • D. 

      Primary consumer

  • 7. 
    In the food web above, which is a correct sequence for the flow of energy in a food chain containing the leopard seal?
    • A. 

      Phytoplankton --> krill --> penguin --> leopard seal

    • B. 

      Smaller toothed whales --> leopard seal --> fish --> krill

    • C. 

      Other birds --> leopard seal --> other seals --> baleen whale

    • D. 

      Carnivorous zooplankton --> other seals --> leopard seal --> smaller toothed whales

  • 8. 
    The total amount of living tissue within a given trophic level is called the
    • A. 

      Organic mass.

    • B. 

      Trophic mass.

    • C. 

      Energy mass.

    • D. 

      Biomass.

  • 9. 
    Only 10 percent of the energy stored in an organism can be passed on to the next trophic level. Of the remaining energy, some is used for the organism’s life processes, and the rest is
    • A. 

      Used in reproduction.

    • B. 

      Stored as body tissue.

    • C. 

      Stored as fat.

    • D. 

      Released as heat.

  • 10. 
    Which energy pyramid accurately represents the transfer of energy in a desert food chain including cactus, hawk, insect, and snake?
    • A. 
    • B. 
    • C. 
    • D. 
  • 11. 
    An oxpecker is a bird that usually feeds on parasites on a rhinoceros’s back. It occasionally picks scabs off the rhinoceros’s back and drinks blood from the wounds. Describe the relationship(s) between the oxpecker and the rhinoceros.
    • A. 

      Mutualism only

    • B. 

      Mutualism and predation

    • C. 

      Mutualism and parasitism

    • D. 

      Mutualism and commensalism

  • 12. 
    A flagellated protozoan lives within the intestines of a termite and helps it digest wood. What type of relationship most likely exists between the protozoan and the termite?
    • A. 

      Competitive

    • B. 

      Mutualistic

    • C. 

      Parasitic

    • D. 

      Predatory

  • 13. 
    Epiphytes are plants such as orchids and staghorn ferns that grow on the outside of other plants without taking any nourishment from them. The tree is the host and provides the branches that support the epiphytes but the tree is not harmed and receives no benefit. Epiphytes and trees represent what kind of interaction with each other?
    • A. 

      Commensalism

    • B. 

      Competition

    • C. 

      Parasitism

    • D. 

      Mutualism

  • 14. 
    Which ecological pyramid is shown above?
    • A. 

      Energy pyramid

    • B. 

      Pyramid of numbers

    • C. 

      Biomass pyramid

    • D. 

      Food pyramid

  • 15. 
    When an ecosystem reaches the last stage of succession, what is it referred to as? 
    • A. 

      A climax community

    • B. 

      A stable community

    • C. 

      A forest

    • D. 

      A final stage ecosystem

  • 16. 
    Which of the following is NOT and example of symbiosis? 
    • A. 

      Commensalism

    • B. 

      Competition

    • C. 

      Parasitism

    • D. 

      Mutualism

  • 17. 
    Which of the following occurs during the ecological succession of an ecosystem?
    • A. 

      An ecosystem reaches a final, unchanging stage.

    • B. 

      Changes occur that are caused by organisms outside the ecosystem.

    • C. 

      Living organisms modify their environment a little at a time.

    • D. 

      Parts of communities split off to form new communities.

  • 18. 
    Primary succession would occur
    • A. 

      In a desert.

    • B. 

      On an island just formed by a volcanic eruption.

    • C. 

      In an area after a forest fire.

    • D. 

      In an abandoned farm field.

  • 19. 
    Which of these statements is true of parasitism?
    • A. 

      The presence of a parasite does not affect the host.

    • B. 

      Parasitism is identical to predation.

    • C. 

      The presence of a parasite may make an animal more susceptible to predation.

    • D. 

      Parasitism is a cooperative relationship between two species.

  • 20. 
    When a new volcanic island forms, the pioneer species is the first species to successfully inhabit the island. Which organism is the most likely candidate for a pioneer species?
    • A. 

      A seagull hatched from an egg laid on the island

    • B. 

      A palm tree grown from a coconut that washed onto shore

    • C. 

      Lichen deposited on rocks by the wind

    • D. 

      Insect larvae carried on a piece of driftwood

  • 21. 
    The sequential replacement of species in a community after a forest fire is
    • A. 

      A disturbance

    • B. 

      Secondary succession.

    • C. 

      Primary succession.

    • D. 

      Pioneer succession.

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