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