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Aquatic Ecosystems Rev. #1
Test Description: A review of freshwater and marine ecosystems.
Instructions: Answer all questions to get your test result.
1) Wetlands are important to fisheries in the United States because
A
wetlands have the cleanest waters
B
wetlands are the easiest places to catch fish
C
wetlands are extremely fragile and are protected by many federal and state laws
D
many fish use wetlands for feeding, breeding and spawning
2) Animals that live in estuaries
A
tend to have very few offspring
B
benefit from unpolluted habitats
C
must be adapted to varying salinity and water levels
D
are anchored to rocky shores with the help of rhizomes
3) Tiny animals that exrete limestone (calcium carbonate) are called
A
coral polyps
B
barnacles
C
nekton
D
zooplankton
4) What are the two main types of freshwater wetlands?
A
open and shallow
B
swamp and marsh
C
salt and brackish
D
mangrove and salt
5) What is the largest estuary in the United States?
A
New York Harbor
B
Everglades
C
Chesapeake Bay
D
Great Barrier Reerf
6) What is one way that coral reefs may be damaged?
A
by large marine predators
B
by freshwater mixing in with the salt water
C
reef erosion caused by high tides
D
excessive sunlight resulting in rapid build-up of phytoplankton
7) Which of the following is classified a marine ecosystem?
A
All the above
B
coral reefs
C
coastal wetlands
D
polar ecosystems
8) How deep does light penetrate into the ocean water?
A
all the way to the bottom
B
about 1.5 miles
C
about 100 m (330 ft)
D
a few inches
9) Which of the following is not an example of zooplankton?
A
very small jelly fish
B
larvae of fish, oysters and clams
C
microscopic shrimp
D
algal blooms
10) Which ocean zone is the habitat to mostly decomposers and scavengers?
A
the open ocean surface
B
the shallow coastal waters
C
the sandy ocean shore
D
the deep ocean (including the ocean floor)
*select an answer for all questions
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