Exam 2 - Exam 2 e 1) The accumulation of calcium carbonate...

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Exam 2 E e 1) The accumulation of calcium carbonate sediments on the ocean floor should decrease with increasing depth in the ocean because a. Most carbonate producing organisms rely on photosynthesis in one way or another b. Siliciclastic deposition always increases with depth, crowding out carbonates c. Carbonate solubility increases with increasing depth d. All of the above e. a and c only d 2) Photosynthesis is important for the production of calcium carbonate sediments because a. photosynthetic organisms provide food for calcium carbonate producing organisms b. some calcium carbonate producing organisms are photosynthetic c. photosynthesis lowers carbon dioxide concentrations, which promotes the formation of CaCO 3 d. all of the above e. a and b only d 3) Which of the following statements about the important environmental conditions required for calcium carbonate production is NOT true? a. If seawater evaporates and increases its salinity from 35 parts per thousand to 45 parts per thousand, carbonate organisms will suffer b. If nutrient supplies drop below normal, carbonate organisms will suffer; if nutrient supplies increase well above normal, carbonate organisms will flourish c. Corals growing on oil rigs in the Gulf of Mexico are evidence that the Gulf is normally too cold to support normal coral reefs d. Only b and c are not true e. a, b, and c are not true a 4) Which pair of equations bests describes the chemical reaction that produces
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Exam 2 - Exam 2 e 1) The accumulation of calcium carbonate...

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