Geology 117: The Oceans

Self-Administered Quizzes

Quiz No. 8 -- Covers topics 37 - 40

 

1. Only about 10-30% of gross primary production in surface ocean waters

A. escapes consumption/decomposition and is preserved and buried in deep-sea sediments.

B. is passed up to the next trophic level

C. is lost to high- level carnivores

D. is recycled after organisms die

 

2. In polar oceans, primary production is limited most strongly by

A. seasonal avilability of the sunlight

B. availability of nutrients.

C. downwelling of nutrient-rich waters

D. carnivores at higher trophic levels

 

3. Respiration uses _________ and produces _________.

A. carbon dioxide.... oxygen

B. oxygen... carbon dioxide

C. phosphorus ..... nitrogen

D. nitrogen.... phosphorus

 

4. In terms of net primary productivity, the open-ocean environment is about as productive as:

A. intensely cultivated fields.

B. tropical rain forests.

C. prairie land.

D. deserts.

E. alpine forests.

 

5. Corals depend on ______ for their survival

A. cold water

B. nutrient-rich water

C. symbiosis

D. abundant phytoplankton in the water

 

6. Which of the following controls the distribution of fishing areas in the world's oceans?

A. Primary productivity

B. Trophic structure of the food chain that supports the harvested fish

C. Temperature and salinity of local seawater

D. A and B

E. A, B, and C

 

7. Coastal upwelling zones are more productive (per unit area) than open ocean areas because _____________ in upwelling zones.

A. nutrients are abundant

B. phytoplankton are abundant

C. food chains are shorter

D. All of the above are correct.

E. None of the above are correct.

 

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Answers: 1=B, 2=A, 3=B, 4=D, 5=C, 6=D, 7=D

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