Consider the following statements about corals and coral reefs 1 Corals and zooxanthe...........

Environment and Ecology Natural ecosystems and protection

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Consider the following statements about corals and coral reefs.

1. Corals and zooxanthella lives in a symbiotic relationship.

2. Sea fans and gorgonians are species coral species that are associated with reef building.

3. Reef building corals are called hermatypic corals.

4. There are more cold-water coral reefs worldwide than tropical reefs.

Which of the above statement(s) is(are) correct?

1, 2 and 3 only

1, 3 and 4 only

1, 2 and 4 only

1 and 3 only

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Explanation:

Corals are living animals and represent symbiotic relationship between algae called zooxanthellae and coral polyps. Zooxanthellae provide the corals with food and nutrition whereas the corals polyps provide zooxanthellae with protected environment. Hermatypic corals are the reef building corals. As per UNEP there are more number of cold water reefs than warm water reefs. Therefore, answer is B.