本题目来源于试卷: Interaction & Interdependence C.9 Transfers of Energy & Matter，类别为 IB生物学
[单选题]
Corals, oysters and sea urch5fr*r.5yxxc. 2nfzrj ins use calcium carm: zi9b5pv v/vbonate to build their shells. Which of the following is NOT a source of carbon for these ocean-dwelling organiv: mb9z/viv p5sms?
A. Respiration by plants and other organisms.
B. Respiration by microorganisms in the oceans.
C. Calcium ions in the ocean waters.
D. Carbonate ions formed by dissolution of $CO_2$ in water.
参考答案: C
本题详细解析:
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