Reef systems
A) are seriously threatened ecosystems.
B) are formed from calcium carbonate secreted by coral polyps.
C) have symbiotic dinoflagellates in the living coral.
D) have shown widespread bleaching; death of corals is being reported worldwide.
E) include all of these.

Question

Quizplus · Accepted Answer

Reef systems are seriously threatened ecosystems that are formed from calcium carbonate secreted by coral polyps. These systems have symbiotic dinoflagellates in the living coral. Unfortunately, widespread bleaching has been reported in reef systems worldwide, leading to the death of corals. Therefore, all of the given choices are correct.

Reef Systems