Question

1. true or false: coral reefs cover more than 1% of the ocean floor.
2. true or false: coral polyps are responsible for forming the hard external skeleton of coral reefs.
3. true or false: all coral reefs are found in deep, cold waters.
4. true or false: zooxanthellae provide corals with energy through photosynthesis.
5. true or false: climate change has no impact on coral reefs.
6. true or false: coral reefs can support up to 50% of marine species.
7. true or false: the maldives is known for its extensive coral reef systems.
8. true or false: sedimentation and pollution have beneficial effects on coral reefs.
9. true or false: coral bleaching occurs when corals expel their zooxanthellae due to stress.
10. true or false: coral reefs are not essential for coastal protection against storms.

Explanation:

1. Coral reefs cover less than 1% of the ocean floor.
2. Coral polyps secrete calcium carbonate to form the hard external skeleton of coral reefs.
3. Coral reefs are typically found in shallow, warm - water environments.
4. Zooxanthellae live symbiotically with corals and provide them with energy through photosynthesis.
5. Climate change, such as rising sea temperatures and ocean acidification, has a major negative impact on coral reefs.
6. Coral reefs support a large number of marine species, but not up to 50%.
7. The Maldives is well - known for its extensive coral reef systems.
8. Sedimentation and pollution are harmful to coral reefs.
9. Coral bleaching occurs when corals expel their zooxanthellae due to stress factors like high temperatures.
10. Coral reefs are important for coastal protection against storms as they can reduce wave energy.

Answer:

1. False
2. True
3. False
4. True
5. False
6. False
7. True
8. False
9. True
10. False