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Baleen whales are the biggest animals that have ever lived on earth. They often ram boats and
swallow humans. correct answers False
Which ecosystem has the greatest biodiversity (number of species per unit of area) of
macroscopic animals and plants? correct answers tropical coral reefs
What is believed to cause corals to expel their zooxanthellae and "bleach"? correct answers
warmer temperature
Match each of the following marine organisms with their identifying characteristics. correct
answers Baleen whales = largest filter feeders
Echinoderms = Spiny skin
Red algae = Complex life cycles with multiple stages
Dinoflagellates = Microalgae that can cause red tide toxic blooms
Diatoms = Have silica (glass) shells
Crabs and Lobsters = Decopods (have 10 legs)
Manatee = Herbivorous marine mammal
Mangrove = Intertidal zone tree
Sponges = Structurally simple animal that filters water
Anemones and Medusae = Have stinging cells on their tentacles
Snails and sea slugs = Have a muscular foot, eat with a radula
Mussel and clam = Mollusks with 2 shells
Hermit crab = Crustacean that lives in a snail
Hagfish and lampreys = Jawless fish
Sharks = Skeleton of cartilage,not bone
Tuna, salmon or anchovy = Bony fish with ray fins
Leatherback sea turtle = marine reptile that returns to the land to lay eggs
What do we call the great circles of currents which circulate around entire ocean basins? correct
answers gyres
Which of the following are common in the local oceans of Los Angeles County? correct answers
kelp forests
What consumes the dead bodies of marine organisms? correct answers detritivores
All of the following contribute nutrients to the ocean. Which one most often leads to coastal dead
zones? correct answers intensive farm fertilization
Over the past 2 decades, the total global catch of seafood has ________________. correct
answers Decreased or stayed about the same
Reef building corals require the right conditions to live and grow. Which of the following is
NOT something they require? correct answers sunlight
, cleaning fish
clear water
particles to eat
Decomposition uses oxygen. What happens when the oxygen concentration in water gets too
low? correct answers Mercury accumulates.
Fish and other animals die.
Fish swim faster.
What is the deepest part of the seafloor? correct answers Marine trenches
Deep sea fishes have such large mouths because food is abundant and they eat a lot. correct
answers False
Where does most of the food in the deep sea come from? correct answers near the surface
When a species has a disproportionately large influence on the characteristics of its ecosystem
even when it is not very abundant, it is a _____________ species. correct answers Keystone
Green sea turtles, dugongs, manatees and sea birds all eat seagrass. correct answers True
During an El Nino season, what happens to the upwelling of cold, nutrient rich, deep water off
the Pacific coasts of the Americas? correct answers It decreases
In eutrophic waters, photosynthesis by algae_____? correct answers uses up all the oxygen
produces oxygen
causes the amount of algae to decline
If you found a small fish with large eyes, a large mouth, photophores, weak mussels and no swim
bladder, where would it probably live? correct answers in the deep ocean, mesopelagic
From the beginning of recorded history to the end of the twentieth century, what was the trend in
total fisheries production? correct answers Increasing
Global climate change is caused by pollution. correct answers True
What makes a harmful algal bloom harmful? correct answers toxins produced by the cells
All of the following human activities have direct impacts on coral reef ecosystems: fishing,
eutrophication, dynamiting, cyanide poisoning, deforestation, bleaching with chlorine bleach,
ocean acidification. correct answers False
Which of the following organisms would you find highest in the intertidal zone? correct answers
red seaweeds
blue whales
sea urchins
Baleen whales are the biggest animals that have ever lived on earth. They often ram boats and
swallow humans. correct answers False
Which ecosystem has the greatest biodiversity (number of species per unit of area) of
macroscopic animals and plants? correct answers tropical coral reefs
What is believed to cause corals to expel their zooxanthellae and "bleach"? correct answers
warmer temperature
Match each of the following marine organisms with their identifying characteristics. correct
answers Baleen whales = largest filter feeders
Echinoderms = Spiny skin
Red algae = Complex life cycles with multiple stages
Dinoflagellates = Microalgae that can cause red tide toxic blooms
Diatoms = Have silica (glass) shells
Crabs and Lobsters = Decopods (have 10 legs)
Manatee = Herbivorous marine mammal
Mangrove = Intertidal zone tree
Sponges = Structurally simple animal that filters water
Anemones and Medusae = Have stinging cells on their tentacles
Snails and sea slugs = Have a muscular foot, eat with a radula
Mussel and clam = Mollusks with 2 shells
Hermit crab = Crustacean that lives in a snail
Hagfish and lampreys = Jawless fish
Sharks = Skeleton of cartilage,not bone
Tuna, salmon or anchovy = Bony fish with ray fins
Leatherback sea turtle = marine reptile that returns to the land to lay eggs
What do we call the great circles of currents which circulate around entire ocean basins? correct
answers gyres
Which of the following are common in the local oceans of Los Angeles County? correct answers
kelp forests
What consumes the dead bodies of marine organisms? correct answers detritivores
All of the following contribute nutrients to the ocean. Which one most often leads to coastal dead
zones? correct answers intensive farm fertilization
Over the past 2 decades, the total global catch of seafood has ________________. correct
answers Decreased or stayed about the same
Reef building corals require the right conditions to live and grow. Which of the following is
NOT something they require? correct answers sunlight
, cleaning fish
clear water
particles to eat
Decomposition uses oxygen. What happens when the oxygen concentration in water gets too
low? correct answers Mercury accumulates.
Fish and other animals die.
Fish swim faster.
What is the deepest part of the seafloor? correct answers Marine trenches
Deep sea fishes have such large mouths because food is abundant and they eat a lot. correct
answers False
Where does most of the food in the deep sea come from? correct answers near the surface
When a species has a disproportionately large influence on the characteristics of its ecosystem
even when it is not very abundant, it is a _____________ species. correct answers Keystone
Green sea turtles, dugongs, manatees and sea birds all eat seagrass. correct answers True
During an El Nino season, what happens to the upwelling of cold, nutrient rich, deep water off
the Pacific coasts of the Americas? correct answers It decreases
In eutrophic waters, photosynthesis by algae_____? correct answers uses up all the oxygen
produces oxygen
causes the amount of algae to decline
If you found a small fish with large eyes, a large mouth, photophores, weak mussels and no swim
bladder, where would it probably live? correct answers in the deep ocean, mesopelagic
From the beginning of recorded history to the end of the twentieth century, what was the trend in
total fisheries production? correct answers Increasing
Global climate change is caused by pollution. correct answers True
What makes a harmful algal bloom harmful? correct answers toxins produced by the cells
All of the following human activities have direct impacts on coral reef ecosystems: fishing,
eutrophication, dynamiting, cyanide poisoning, deforestation, bleaching with chlorine bleach,
ocean acidification. correct answers False
Which of the following organisms would you find highest in the intertidal zone? correct answers
red seaweeds
blue whales
sea urchins
