Coral reefs held together by Calcium carbonate
Q. Which of the following statements is/are correct about Coral reefs?
1. Coral reefs are diverse underwater ecosystems held together by Calcium iodide.
2. Reefs grow best in cold, shallow, clear, sunny and agitated waters.- Published on 06 Nov 15a. Only 1
b. Only 2
c. Both
d. None
ANSWER: None
- Coral reefs are diverse underwater ecosystems held together by calcium carbonate structures secreted by corals.
- Coral reefs are built by colonies of tiny animals found in marine waters that contain few nutrients. Most coral reefs are built from stony corals, which in turn consist of polyps that cluster in groups.
- The polyps belong to a group of animals known as Cnidaria, which also includes sea anemones and jellyfish.
- Unlike sea anemones, corals secrete hard carbonate exoskeletons which support and protect the coral polyps.
- Reefs grow best in warm, shallow, clear, sunny and agitated waters.
