Question

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> What do the corals secrete during their digestive process?

• A.
  CaSO4
  
• B.
  CaCO3
  
• C.
  MgCO3
  
• D. Both (a) and (b)

Answer 1

The correct option is D Both (a) and (b)

Corals secrete CaCO3 as a result of digestive process. This CaCO3 builds the reefs.