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Both the carbon and nitrogen cycles are vital for life on Earth. Which of the following is not a similarity between these two elemental cycles?Choose one:A. Both affect the biochemical oxygen demand in bodies of waterB. Fixation of both elements is only conducted by prokaryotes.C. Both produce greenhouse gases.D. The atmosphere is the main organismal source for both elements.

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If your eyes fill with tears when you watch a television program about children who are growing without enough food and no medical care, you are experiencing __________.A.guiltB.sympathyC.empathyD.shame

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