Oceanography Questions
Duxbury Chapter 15

  1. What forms the base of the ocean's trophic pyramid?
    Carnivorous fish
    Carnivorous zooplankton
    Herbivorous zooplankton
    Phytoplankton
    Tuna, sharks, and marine mammals

  2. What forms the top of the ocean's trophic pyramid?
    Carnivorous fish
    Carnivorous zooplankton
    Herbivorous zooplankton
    Phytoplankton
    Tuna, sharks, and marine mammals

  3. Which organisms in the food chain are autotrophic?
    Carnivores
    Decomposers
    Herbivores
    Omnivores
    Producers

  4. Which of the following plankton groups produces chalk deposits?
    Blue-green algae
    Coccolithophores
    Diatoms
    Dinoflagellates
    Radiolarians

  5. Which type of plankton lives in a shell called a frustule?
    Blue-green algae
    Coccolithophores
    Diatoms
    Dinoflagellates
    Radiolarians

  6. Which type of plankton is responsible for the phenomenon called Red Tide?
    Blue-green algae
    Coccolithophores
    Diatoms
    Dinoflagellates
    Radiolarians

  7. Which zooplankton is known as krill and is a favorite food of baleen whales?
    Comb jellies
    Copepods
    Euphausiids
    Jellyfish
    Pteropods

  8. What is the oxygen compensation depth?
    The depth at which oxygen and carbon dioxide levels are the same
    The depth at which oxygen production and consumption are the same
    The depth at which photosynthesis is at its maximum level
    The depth at which respiration is at its maximum level
    The depth of the oxygen minimum

  9. What is a typical value for the oxygen compensation depth?
    10 meters
    1500 meters
    200 meters
    4000 meters
    70 meters

  10. In which type of relationship(s) do both participants always benefit?
    Comensalism
    Mutualism
    Parasitism
    Symbiosis
    All of the above

  11. Which nutrient(s) must go through three stages of bacterial breakdown before it can be used by marine plants?
    Carbon
    Nitrogen
    Oxygen
    Phosphorus
    All of the above

  12. Which nutrient(s) can be incorporated into marine sediments in large quantities?
    Carbon
    Nitrogen
    Oxygen
    Phosphorus
    All of the above

  13. Which form of nitrogen is most needed by marine plants?
    Ammonia
    Molecular nitrogen
    Nitrate
    Nitrite
    Nitrous oxides

  14. How do marine plants get their nutrients?
    From seawater
    From sunlight
    From the air
    From their food
    Nitrous oxides

  15. How do marine animals get their nutrients?
    From seawater
    From sunlight
    From the air
    From their food
    Nitrous oxides

  16. How do marine plants get their energy?
    From seawater
    From sunlight
    From the air
    From their food
    Nitrous oxides

  17. How do marine animals get their energy?
    From seawater
    From sunlight
    From the air
    From their food
    Nitrous oxides

  18. What is typically the efficiency of energy from one trophic level to another?
    10% or less
    100%
    20%
    200%
    50%

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