L20 海

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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?

Intertidal zone Signup and view all the answers

Which biome is considered a highly diverse and productive area?

Coral reef biome Signup and view all the answers

Which type of biome relies on chemosynthesis to produce food?

Deep ocean biome Signup and view all the answers

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

Wind Signup and view all the answers

Which zone of the ocean has the highest primary productivity?

Epipelagic zone Signup and view all the answers

What causes coastal upwelling in the ocean?

Winds Signup and view all the answers

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

71% 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?

Open Oceans Signup and view all the answers

Where are kelp forests primarily found?

South Atlantic, South Australia, New Zealand, and South Africa Signup and view all the answers

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

Seagrass Beds Signup and view all the answers

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

Hydrothermal vents Signup and view all the answers

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

Chemosynthesis Signup and view all the answers

Which of the following is true about hydrothermal vents?

They support a variety of organisms Signup and view all the answers

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

Chemosynthesis Signup and view all the answers

What is the main human impact on the deep ocean?

Mining 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?

Thermocline Signup and view all the answers

What are the principal primary producers in the ocean?

Marine algae Signup and view all the answers

Which biome is the largest on Earth?

Open ocean Signup and view all the answers

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

Blooming of phytoplankton Signup and view all the answers

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

Sandy shores Signup and view all the answers

What is the main human impact on coral reefs?

Climate change Signup and view all the answers

Which marine biome is characterized by towering kelp plants?

Kelp forests Signup and view all the answers

Which of the following is a threat to coral reefs?

All of the above Signup and view all the answers

What is the primary producer in kelp forests?

Kelp Signup and view all the answers

Where are seagrass beds typically found?

Shallow coastal waters Signup and view all the answers

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

Tidal action Signup and view all the answers

Which of the following is true about deep ocean biomes?

They have a seasonless climate Signup and view all the answers