The Global Ecosystem

Practice exam questions written by Timothy H. Heaton,
Professor of Earth Sciences, University of South Dakota

Click the circle by an answer with the mouse, then click on the Submit button to get a response. You will be told if your answer is correct or not and will be given some comments.

  1. What kind of organisms can produce their own food?
    Autotrophs.
    Carnivores.
    Herbivores.
    Heterotrophs.
    Omnivores.

  2. What kind of organisms are at the top of the food web?
    Autotrophs.
    Carnivores.
    Herbivores.
    Heterotrophs.
    Omnivores.

  3. What name is given to all organisms that feed on other organisms?
    Autotrophs.
    Carnivores.
    Herbivores.
    Heterotrophs.
    Omnivores.

  4. Which trophic level is represented by the greatest biomass in any ecosystem?
    Herbivores.
    Primary carnivores.
    Producers.
    Secondary carnivores.
    Top carnivores.

  5. Which trophic level is represented by the smallest biomass in any ecosystem?
    Herbivores.
    Primary carnivores.
    Producers.
    Secondary carnivores.
    Top carnivores.

  6. What is an ecosystem?
    All organisms and the physical setting of a given region.
    All organisms living in a given region.
    All organisms that are native to a given region.
    Only the producers living in a given region.
    The physical setting of a given region.

  7. What name is given to the global ecosystem?
    Atmosphere.
    Biosphere.
    Hydrosphere.
    Lithosphere.
    Life cycle.

  8. What is the correct hierarchy of taxonomic categories?
    Kingdom, Phylum, Class, Family, Order, Genus, Species.
    Kingdom, Phylum, Class, Order, Family, Genus, Species.
    Kingdom, Order, Phylum, Family, Class, Genus, Species.
    Kingdom, Phylum, Order, Class, Family, Genus, Species.
    Kingdom, Phylum, Order, Class, Genus, Family, Species.

  9. What name is given to the conditions under which members of a species live and breeds?
    Carrying capacity.
    Ecosystem.
    Habitat.
    Niche.
    Trophic level.

  10. Which of the following was not used by Charles Darwin as an evidence for organic evolution?
    Embryonic similarities.
    Fossils.
    Genetics.
    Homologous structures.
    Variation under domestication.

  11. How does plate tectonics effect evolution and diversity?
    Carrying continents or islands into different climatic zones.
    Creating mountain habitats and barriers.
    Creating or destroying habitat areas.
    Merging or dividing habitat areas.
    All of the above.

Please report any problems or errors to Dr. Heaton.