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Consider the following statements regarding Coral reefs.
- Coral reefs cover more than 25% of the earth’s surface.
- Coral reefs help in substantially reducing coastal flooding and erosion.
- Increased ocean temperature causes reefs to expel the symbiotic algae responsible for their colour.
How many of the above statements is/are correct?
- a)Only one
- b)Only two
- c)All three
- d)None
Correct answer is option 'B'. Can you explain this answer?
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Most Upvoted Answer
Consider the following statements regarding Coral reefs. Coral reefs c...
Statement 1 is incorrect.
- Context: The Great Barrier Reef is experiencing its fifth mass coral bleaching event in eight years, driven by global heating and an El Niño climate pattern.
- Coral reefs are essentially just big limestone structures built by thousands of tiny coral creatures called polyps.
- Increased ocean temperature caused by climate change is the main cause of coral bleaching events. That’s when reefs expel the symbiotic algae responsible for their colour. If that happens over longer periods, the corals can eventually die.
- Coral reefs act like low-crested breakwaters and absorb 97% of wave energy. This substantially reduces coastal flooding and erosion.
- Coral reefs cover less than 0.5% of the earth’s surface, but they are home to about 25% of all marine species.
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Consider the following statements regarding Coral reefs. Coral reefs c...
Explanation:
Coral reefs cover more than 25% of the earth’s surface:
This statement is incorrect. Coral reefs actually cover less than 0.1% of the earth's surface, but they are home to an incredibly diverse range of marine species.
Coral reefs help in substantially reducing coastal flooding and erosion:
This statement is correct. Coral reefs act as natural barriers that help protect coastlines from the impact of waves and storms, reducing coastal flooding and erosion. They provide crucial protection to many coastal communities around the world.
Increased ocean temperature causes reefs to expel the symbiotic algae responsible for their color:
This statement is also correct. When ocean temperatures rise, corals experience stress and expel the algae living in their tissues, causing them to turn white or "bleach." This process, known as coral bleaching, can have devastating effects on coral reef ecosystems.
In conclusion, statement 2 and 3 are correct, while statement 1 is incorrect. So the correct answer is option 'B' - Only two.
Coral reefs cover more than 25% of the earth’s surface:
This statement is incorrect. Coral reefs actually cover less than 0.1% of the earth's surface, but they are home to an incredibly diverse range of marine species.
Coral reefs help in substantially reducing coastal flooding and erosion:
This statement is correct. Coral reefs act as natural barriers that help protect coastlines from the impact of waves and storms, reducing coastal flooding and erosion. They provide crucial protection to many coastal communities around the world.
Increased ocean temperature causes reefs to expel the symbiotic algae responsible for their color:
This statement is also correct. When ocean temperatures rise, corals experience stress and expel the algae living in their tissues, causing them to turn white or "bleach." This process, known as coral bleaching, can have devastating effects on coral reef ecosystems.
In conclusion, statement 2 and 3 are correct, while statement 1 is incorrect. So the correct answer is option 'B' - Only two.
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Consider the following statements regarding Coral reefs. Coral reefs cover more than 25% of the earth’s surface. Coral reefs help in substantially reducing coastal flooding and erosion. Increased ocean temperature causes reefs to expel the symbiotic algae responsible for their colour.How many of the above statements is/are correct?a)Only oneb)Only twoc)All threed)NoneCorrect answer is option 'B'. Can you explain this answer?
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