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MARINE_BIOLOGY_First_examB[1] - MARINE BIOLOGY First exam...

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MARINE BIOLOGY First exam, Fall 2009 NAME:______________________________ B 1. Sediments in sea floor regions near a mid-ocean ridge are than those far from mid-ocean ridges: a) younger b) thicker c) older d) thinner e) a and d 2. Trenches form at areas of plate convergence (or subduction) and ridges form at places of plate divergence. True False 3. Oceanic crust is composed of , whereas makes up most of the continental crust. a) felsite, quartz b) granite, basalt c) basalt, felsite d) basalt, granite e) None of the above 4. Open ocean regions over continental shelves are termed: a) oceanic b) planktonic c) neritic d) pelagic e) benthic 5. Why do some dinoflagellates bioluminesce? a) to attract a mate, b) to be able to see, c) to startle a predator, d) nobody knows, e) as a way of releasing excess energy 6. What formed the White Cliffs of Dover a) coccolithophores, b) dinoflagellates, c) diatoms, d) cyanobacteria, e) zooplankton 7. A halocline is a zone of rapid temperature change. a. True b.False 8. What is a big advantage that dinoflagellates have over other phytoplankton groups a) they can fix nitrogen, b) they have gas vesicles for buoyancy, c) they have a silaceous shell for protection, d) they can swim to deep water at night and take up nutrients, e) none of the above 9. Lithogenous sediments in the ocean arise due to: a) wind-blown desert dust b) weathering of rocks c) river transport d) None of the above e) All of the above 10. Biogenic sediments come mainly from: a) Runoff of terrestrial plant material b) Plankton c) Decomposing whale carcasses d) Wind-blown desert dust e) None of the above
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11. Characteristics of a passive continental margin include: a) Large continental shelves b) Trench formation c) High geological activity d) Plate boundaries e) None of the above 12. Organic compounds principally contain the elements a. Carbon, Oxygen, Hydrogen b. Zinc, Chlorophyll, Carbon c. Carbon, Iron, Berkelium 13. What group of very small phytoplankton are responsible for about half of all photosynthesis in the world’s oceans a) diatoms, b) dinoflagellates, c) radiolarians, d) Prochlorococcus & Synechococcus, e) none of the above 14. The stratification of the Earth’s layers, and which plate ends up on top at a subduction
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