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 urchins use calcium carbonate to build thei*y(cbk z9q90; g/k) y8e isnw hfcqst(r shecu1gdt6y : 1g+rj/lie lls. Which of the following is N+i/j6gt:dl1re yu 1cgOT a source of carbon for these ocean-dwelling organisms?
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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