Exam 20: Nutrient Cycles

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The mercury in fish is normally in the form of elemental mercury (Hg⁰).

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More carbon is present in dead organic material on Earth than in living organisms.

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The two major forms of carbon that remain following microbial degradation are

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When dimethylsulfoniopropionate (DMSP)is aerobically degraded in a marine environment,which product is most often used to support growth?

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Which of the following is a sulfide?

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