Q. With reference to Black Corals consider the following statements:
1.They are known as deep-sea corals.
2.They do not require light for their growth.
3.Black corals do not have symbiotic algae associated with them.
Which of the statements given above are correct?
Answer: D
Notes:
Explanation – Black Corals are known as deep-sea corals are found in all oceans but are most common in deep water habitats of tropical and subtropical seas. They are located in deep oceans so they do not require light for their growth. Unlike reef-building corals in the shallower waters above, black corals lack symbiotic algae (zooxanthellae) in their tissues. Black corals are rarely black, but rather vary in color from white to red, green, yellow, or brown.
Source: The Hindu
