L20 海
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Questions and Answers

Which of the following factors determine the different freshwater biomes?

  • Availability of light and nutrients
  • Productivity and oxygen content (correct)
  • Temperature variation and light availability
  • Water movement and wind
  • What is the primary producer in the ocean?

  • Kelp
  • Seaweed
  • Marine plants
  • Phytoplankton (correct)
  • Which zone of the ocean has low primary productivity?

  • Benthic zone
  • Aphotic zone (correct)
  • Pelagic zone
  • Photic zone
  • What is the area between high and low tide called?

    <p>Intertidal zone</p> Signup and view all the answers

    Which biome is considered a highly diverse and productive area?

    <p>Coral reef biome</p> Signup and view all the answers

    Which type of biome relies on chemosynthesis to produce food?

    <p>Deep ocean biome</p> Signup and view all the answers

    What is the main source of water movement in lakes and ponds?

    <p>Wind</p> Signup and view all the answers

    Which zone of the ocean has the highest primary productivity?

    <p>Epipelagic zone</p> Signup and view all the answers

    What causes coastal upwelling in the ocean?

    <p>Winds</p> Signup and view all the answers

    What percentage of the Earth's surface is covered by marine environments?

    <p>71%</p> Signup and view all the answers

    Which of the following marine biomes is characterized by low productivity and is often referred to as a biological desert?

    <p>Open Oceans</p> Signup and view all the answers

    Where are kelp forests primarily found?

    <p>South Atlantic, South Australia, New Zealand, and South Africa</p> Signup and view all the answers

    Which of the following marine biomes requires clear water and a mixed substrate of solid and sand?

    <p>Seagrass Beds</p> Signup and view all the answers

    What is the primary source of food for organisms in deep ocean biomes?

    <p>Hydrothermal vents</p> Signup and view all the answers

    What is the main process that organisms in hydrothermal vents rely on to produce food?

    <p>Chemosynthesis</p> Signup and view all the answers

    Which of the following is true about hydrothermal vents?

    <p>They support a variety of organisms</p> Signup and view all the answers

    What is the primary source of food for organisms in the deep ocean?

    <p>Chemosynthesis</p> Signup and view all the answers

    What is the main human impact on the deep ocean?

    <p>Mining</p> Signup and view all the answers

    What is the term for the phenomenon that occurs in freshwater environments where warm water floats on the surface?

    <p>Thermocline</p> Signup and view all the answers

    What are the principal primary producers in the ocean?

    <p>Marine algae</p> Signup and view all the answers

    Which biome is the largest on Earth?

    <p>Open ocean</p> Signup and view all the answers

    What is the main cause of harmful algal blooms or red tides?

    <p>Blooming of phytoplankton</p> Signup and view all the answers

    Which marine biome is characterized by shifting sand dunes and waves?

    <p>Sandy shores</p> Signup and view all the answers

    What is the main human impact on coral reefs?

    <p>Climate change</p> Signup and view all the answers

    Which marine biome is characterized by towering kelp plants?

    <p>Kelp forests</p> Signup and view all the answers

    Which of the following is a threat to coral reefs?

    <p>All of the above</p> Signup and view all the answers

    What is the primary producer in kelp forests?

    <p>Kelp</p> Signup and view all the answers

    Where are seagrass beds typically found?

    <p>Shallow coastal waters</p> Signup and view all the answers

    What is the main factor that determines the vertical zonation in rocky intertidal zones?

    <p>Tidal action</p> Signup and view all the answers

    Which of the following is true about deep ocean biomes?

    <p>They have a seasonless climate</p> Signup and view all the answers

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