Which is the part of the coral that is built up over thousands of years into a reef?
Understand the Problem
The question is asking which labeled part of the coral anatomy, as shown in the image, has the role of forming a reef over thousands of years.
Answer
D
The part of the coral that is built up over thousands of years into a reef is D.
Answer for screen readers
The part of the coral that is built up over thousands of years into a reef is D.
More Information
Coral skeletons, made of calcium carbonate, are what accumulate to form the massive structures known as coral reefs.
Tips
A common mistake is confusing other parts of the coral, such as polyps, with the skeletal structure that forms reefs.
Sources
- Basic Information about Coral Reefs | US EPA - epa.gov
- Coral reef - Wikipedia - en.wikipedia.org
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