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| 1 | |
The shelf break occurs at which depth? |
| | A) | the lowest tide mark |
| | B) | about 40 m |
| | C) | 150 m |
| | D) | 1000 m |
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| 2 | |
Which feature would you NOT expect to see on the continental shelf off the mouth of the Mississippi River? |
| | A) | lithogenous sediment |
| | B) | abundant nutrients in the water |
| | C) | constant water temperature year-round |
| | D) | water with a greenish tint |
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| 3 | |
In Antarctica, there are no intertidal communities because of |
| | A) | very cold water. |
| | B) | scouring by ice. |
| | C) | low nutrients. |
| | D) | low primary productivity. |
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| 4 | |
Animals of soft-bottom subtidal communities must cope with |
| | A) | dessication. |
| | B) | drastic changes in temperature. |
| | C) | turbulence. |
| | D) | salinity changes. |
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| 5 | |
The "sweet potato", Molpadia, is a sea cucumber. It is a deposit feeder that creates mounds of disturbed sediment. The sweet potato is considered to be an example of a |
| | A) | filter-feeder. |
| | B) | bioturbator. |
| | C) | primary producer. |
| | D) | scavenger. |
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| 6 | |
A fish that feeds on infauna is the |
| | A) | flounder. |
| | B) | reef shark. |
| | C) | ray. |
| | D) | sea horse. |
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| 7 | |
An animal that eats seagrass leaves is the |
| | A) | manatee. |
| | B) | queen conch. |
| | C) | starfish. |
| | D) | tube-dwelling polychaete. |
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| 8 | |
Near a seagrass bed, one could expect to find all of these conditions but which one? |
| | A) | reduced turbulence |
| | B) | fine sediment being deposited |
| | C) | lots of detritus |
| | D) | many rocks |
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| 9 | |
On a rocky subtidal bottom, competition is largely for |
| | A) | oxygen. |
| | B) | food. |
| | C) | space. |
| | D) | nutrients. |
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| 10 | |
A steep, shaded rocky subtidal area might be inhabited by |
| | A) | sponges. |
| | B) | heart urchins. |
| | C) | branched brown algae. |
| | D) | green algae. |
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| 11 | |
If you wanted to grow kelp on rocks in the Caribbean Sea, could you do so? |
| | A) | Yes, because the water is clear. |
| | B) | Yes, because there are plenty of rocks on which it can grow. |
| | C) | No, because the water is too warm. |
| | D) | No, because the water is too shallow. |
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| 12 | |
Kelps of the understory generally |
| | A) | form a canopy. |
| | B) | adapt to reduced light levels. |
| | C) | have large pneumatocysts. |
| | D) | are encrusting forms. |
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| 13 | |
Sea urchin barrens may be the result of all of these reasons but which one? |
| | A) | higher survival of sea urchin larvae |
| | B) | absence of sea otters |
| | C) | sewage pollution |
| | D) | a "La Niña" event |
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| 14 | |
Even though they do not eat kelp, fishes often are seen to nibble at the blades. What might they be eating? |
| | A) | hermit crabs |
| | B) | bryozoans |
| | C) | epiphytic algae |
| | D) | meiofauna |
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| 15 | |
There may be a link between overfishing of sea urchins in the Gulf of Maine and |
| | A) | an increase in the number of lobsters. |
| | B) | an increase in the number of cod. |
| | C) | die-offs of sea otters. |
| | D) | growth of giant kelp. |
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| 16 | |
A commercially valuable species that may inhabit seagrass beds is the |
| | A) | Atlantic bay scallop. |
| | B) | topsmelt. |
| | C) | halibut. |
| | D) | sand dollar. |
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