Through Geologic History Reefs Have Episodically Been Devastated by Mass

question 98

Multiple Choice

Through geologic history reefs have episodically been devastated by mass extinction. Today corals are primary reef builders, but in the past other groups formed important parts of reef communities. These groups include:

• A)sponges.
• B)bacteria.
• C)gastropods.
• D)bryozoans.
• E)chordates.

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