Question 3 of 12 625 points name a human activity

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Question 3 of 12 6.25 Points Name a human activity that can result in an overabundance of nutrients being delivered to coastal waters. Refer to pgs 403-405 in the textbook. A.Agriculture and overuse of fertilizers. B.Animal wastes from farms and ranches. C.Sewage from cities. D.All of the above. Answer Key: Feedback: While agriculture gets blamed for the majority of nutrient pollution recent evidence suggests that urban sewage is an even greater source of over-nutrient discharge into water bodies. D Page 2 of 6 Week 8 Lab Worksheet: Seafood Production in Estuaries and Marine Pollution
Question 4 of 12 6.25 Points Which activity does NOT contribute to the nutrient enrichment of the Mississippi River? D
Question 5 of 12 6.25 Points What are the effects from reduced light penetration due to excessive nutrients and increased algal growth on ocean organisms? Refer to pg 396. 403 in the textbook and pg LM-57, pg 154/Chap#42: Nutrients in the Lab Manual.
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C.Eventually reduced food for consumers as algae thus die off. D.All of the above. Answer Key: D Feedback: Think about the cumulative effects of masses of dead and decaying algae: less light penetration thus less photosynthesis, lower water temperatures, less food as the algae decays and rots. Thus the answer is: All of the Above. Now these same conditions prevailed in the great Panthalassic Ocean that existed 300-237 million yrs ago before the break-up of Pangea. These masses of dead and decaying algae sank and created today's petroleum deposits.

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