Geology 117: The Oceans

Self-Administered Quizzes

Quiz No. 7-- Covers topics 31 - 36

 

1. In an estuary

A. a river flows into the sea without mixing with it

B. mixing of fresh and salt water drives the circulation of water

C. mixing of fresh and salt water impedes the circulation of water

D. shallow water sinks to the bottom of the oceans

 

2. Planktonic organisms are _______, whereas nektonic organisms are ______.

A. drifters....swimmers

B. swimmers .... drifters

C. deep dwellers... shallow dwellers

D. shallow dwellers... deep dwellers

 

3. The most numerous type of nekton is

A. vertebrates

B. invertebrates

C. algae

D. phytoplankton

 

4. Whales, porpoises, and dolphins are members of the

A. pinnepeds

B. ectoplankton

C. shark family

D. bony fishes

E. None of the above

 

5. Animals that live attached to the sea floor are typically

A. filter feeders.

B. predators.

C. deposit feeders.

D. grazers.

E. carnivores.

 

6. Diatoms and dinoflagellates are both:

A. organisms with silica shell walls.

B. producers of large amounts of sediments.

C. members of the plankton.

D. members of the benthos.

E. carnivores high on marine food chains.

 

7. An important characteristic of intertidal zones on rocky shores is:

A. low primary productivity and food resources.

B. the absence of attached plants.

C. uniform physical conditions, such as temperature, salinity, waves, etc.

D. relatively few species.

E. distinct depth zonation of plants and animals.

 

8. Organisms that synthesize their own food from inorganic substances are called:

A. herbivores.

B. autotrophs.

C. heterotrophs.

D. predators.

E. carnivores.

 

9. Bacteria living in the ocean are:

A. a food source for other organisms.

B. decomposers of organic matter.

C. recyclers of nutrients.

D. All of these are correct.

E. None of these are correct.

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Answers: 1=B, 2=A, 3=A, 4=E, 5=A, 6=C, 7=E, 8=B, 9=D

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