Chalk is gradually formed of dead______________?
Correct answer: B. Foraminiferans
- A. Actinopods
- B. Foraminiferans
- C. Apicomplexans
- D. Radiolarians
Explanation
Chalk is formed largely from accumulated calcium carbonate shells of dead foraminiferans, microscopic marine protists. Students may choose radiolarians because they also form abundant marine fossils, but radiolarian skeletons are mainly silica and contribute to siliceous deposits rather than chalk. The submitted key matches.
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