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Prelim_2_MM_changes_Ver_A_Answers - EAS/BIOEE 154 Prelim 2...

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1 EAS/BIOEE 154 Prelim 2 VERSION: A Fall 2007 1. Which Prelim VERSION are you taking? a. A b. B 2. Net Primary Production (NPP) is: a. the difference between the amount of CO 2 consumed by photosynthesis and the amount of CO 2 produced by respiration b. the net accumulation of carbon within the phytoplankton cell c. both a and b 3. The compensation light level refers to the light level where a. photosynthesis is less than respiration b. photosynthesis equals respiration c. photosynthesis exceeds respiration d. None of the above 4. When phytoplankton are growing in the light limited range of light intensity, they have a negative net primary production. a. True b. False 5. Phytoplankton are photoinhibited when 6. The depth at which phytoplankton cells exhibit zero net primary production is called the 7. Nitrogen, phosphorous, and silica concentrations are generally
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2 8. The main source of iron input to the surface ocean layer is from a. vertical mixing of cold deep ocean water b. horizontal Ekman transport c. dust blowing off of continents d. none of the above 9. Subtropical Gyres have low levels of primary production per square meter because a. The subtropical gyres receive little river input b. Trade winds are too weak to vertically mix large amounts of nutrients to the surface c. There is a persistent lens of warm low-nutrient surface water that depresses the thermocline and associated nutricline 10. Primary production along most of the equator is high because the trade winds cause: 11. Primary production along coastal areas is high because: a. Tidal mixing is enhanced over shallow continental shelf regions b. Winds are most intense along continental boundaries and this causes strong vertical mixing, bringing deep nutrient rich water to the surface c. Onshore winds drive surface layer phytoplankton close to shore where they become highly concentrated
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