Question

Which of the following organisms possess a skeleton made of calcium bicarbonate?

• A. Meandrina
• B. Physalia
• C. Adamsia
• D. Pennatula

Answer 1

Answer: (A)

Corals have a skeleton made of calcium bicarbonate. They belong to the phylum Coelenterata or Cnidaria.
Physalia - Portuguese man-of-war
Adamsia - Sea anemone
Pennatula - Sea-pen
Meandrina - Brain coral