Answer :
Answer:
calcium carbonate
A coral reef is made of thin layers of calcium carbonate
Massive reef structures are formed when each individual stony coral organism—or polyp—secretes a skeleton of calcium carbonate.
Explanation:
Answer:
calcium carbonate
A coral reef is made of thin layers of calcium carbonate
Massive reef structures are formed when each individual stony coral organism—or polyp—secretes a skeleton of calcium carbonate.
Explanation: