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Coral Reefs
Contributed by: Best
  • 1. What is the name of the largest coral reef system in the world?
A) Caribbean Coral Reef
B) Hawaii Coral Reef
C) Great Barrier Reef
D) Red Sea Reef
  • 2. What is a function of mangrove forests in supporting coral reefs?
A) Stabilize coral limestone structures
B) Provide shade for coral reefs
C) Act as a nursery for juvenile fish
D) Prevent sea level rise
  • 3. Which substance is built up by coral polyps to create the reef structure?
A) Sulfur
B) Silica
C) Iron oxide
D) Calcium carbonate
  • 4. What percentage of Earth's marine species are estimated to live in coral reefs?
A) 50%
B) 75%
C) 10%
D) 25%
  • 5. How do coral reefs benefit humans economically?
A) Providing medicinal herbs
B) Serving as sources of fresh water
C) Enhancing air quality
D) Tourism, fisheries, and protection of coastlines
  • 6. What is the process of mutual benefit between coral and zooxanthellae known as?
A) Symbiosis
B) Commensalism
C) Predation
D) Parasitism
  • 7. What is the main reason behind the recent decline in global coral reef health?
A) Expansion of marine protected areas
B) Climate change
C) Decrease in marine pollution
D) Improved conservation efforts
  • 8. What is the purpose of the zooxanthellae algae living within coral tissues?
A) Provide coral with nutrients through photosynthesis
B) Protect coral against predators
C) Regulate coral reproduction
D) Clean coral from debris
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