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Aquatic Habitat

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Question

in what form marine animals utilise carbon dioxide in making shells?(in short 1mark)

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Solution

To build shells marine animals extract calcium inon (Ca^₂+) and Carbonate ions (CO₃^2-) from sea water combining them into calcium carbonate (CaCO₃).

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Consider the following statements regarding the ways in which carbon dioxide is “fixed” and choose the correct option.

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