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Coral Reefs - Test
  • 1. What is the name of the largest coral reef system in the world?
A) Great Barrier Reef
B) Caribbean Coral Reef
C) Red Sea Reef
D) Hawaii Coral Reef
  • 2. What is a function of mangrove forests in supporting coral reefs?
A) Act as a nursery for juvenile fish
B) Provide shade for coral reefs
C) Prevent sea level rise
D) Stabilize coral limestone structures
  • 3. Which substance is built up by coral polyps to create the reef structure?
A) Calcium carbonate
B) Iron oxide
C) Silica
D) Sulfur
  • 4. What percentage of Earth's marine species are estimated to live in coral reefs?
A) 25%
B) 75%
C) 10%
D) 50%
  • 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) Parasitism
B) Symbiosis
C) Predation
D) Commensalism
  • 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) Improved conservation efforts
D) Decrease in marine pollution
  • 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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