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