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6. Reefs protect what percentage of the coast from erosion?

  • 30%
  • 20%
  • 80%
  • 70%

7. Are reef building corals slow or fast growing?

  • Slow
  • Fast

8. What type of reef is separated from the land?

  • Fringing reef
  • Barrier reef
  • Atolls

9. The mouth in hard corals leads to

  • the epidermal layer
  • the gastrovascular cavity
  • nematocysts

10. Non reef building corals can live in total darkness?

  • True
  • False

11. Are coral polyps carnivorous?

  • Yes
  • No

12. Eggs remain in gastrovascular cavities, fertilised by motile sperm is the action of....

  • brooders
  • broadcasters

13. Where do non-reef building corals get energy from?

  • Corallites
  • Plankton and suspended particles
  • Zooxanthellae

14. Do non-reef building corals have slower or faster growth rates than reef building corals?

  • Slower
  • Faster

15. Reef building corals are restricted to warm, shallow, clear waters

  • True
  • False

16. Coral reefs remove --- kg of CO2 a year?

  • 400 billion
  • 700 billion
  • 100 billion
  • 200 billion

17. Spawning millions of gametes into water for external fertilisation is the action of....

  • broadcasters
  • brooders

18. Coral reefs are home to how many species of fish

  • >3000
  • >5000
  • >4000
  • >6000

19. What is the correct sequence of coral larvae?

  • Settles on suitable substratum -> metamorphoses into polyp -> divides - budding -> clonal colony
  • metamorphoses into polyp -> settles on suitable substratum -> divides - budding -> clonal colony
  • clonal colony -> metamorphoses into polyp -> metamorphoses into polyp -> divides - budding

20. Corals need low water movement for growth

  • False
  • True