Q.

Tiny marine animals which constitute limestone skeletons are called –

A. Clamitomonous
B. Foraminifera
C. Coral reefs
D. Diatoms
Answer» C. Coral reefs
Explanation: Coral reefs are underwater structures made from calcium carbonate secreted by corals. Coral reefs are 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.
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