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Level 2 Quiz
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1

An example of an activity that can damage nearby marine habitats is
A)dumping dredge spoils.
B)treating sewage.
C)creating artificial reefs.
D)recycling plastics.
2

Bleached corals
A)always die.
B)lose all of their zooxanthellae.
C)do not grow.
D)are the result of murky water.
3

Trawling damages soft-bottom communities by
A)removing short-living species.
B)creating scars that offer shelter for predators.
C)stirring up the bottom and smothering animals.
D)breaking off larger attached animal colonies.
4

For a very short time, eutrophication is beneficial to
A)seagrasses.
B)corals.
C)phytoplankton.
D)fisheries.
5

At one time, it was thought that ocean currents and the actions of detrital feeding animals would break down sewage sludge at disposal areas. What is the main reason why this does not happen?
A)There is too much organic matter from the animals to handle the problem.
B)There are too many nutrients in the sludge.
C)There are no bacteria in the sludge.
D)Fish get diseases from eating sludge.
6

The major human source of global warming is
A)use of aerosols.
B)emissions of sulfates from power plants.
C)tropical agriculture.
D)burning fossil fuels.
7

Spilled oil degrades most slowly
A)at the sea's surface.
B)in salt marshes.
C)on the sea floor.
D)on beaches.
8

To rescue an oil-covered bird, a volunteer not only must remove the oil but
A)feed it bacteria that digest oil.
B)keep the bird warm.
C)release the bird back into its natural habitat as soon as possible.
D)keep the bird in isolation.
9

Because of biological magnification, which of these animals would accumulate the most pesticides per body weight?
A)filter-feeding clam
B)small fish
C)grazing snail
D)bald eagle
10

Not all threatened or rare marine species have been over-exploited for food, hides or oil. For what other purpose have many been taken and killed?
A)decorations and souvenirs
B)production of pharmaceutical agents
C)use in cosmetics
D)scientific research
11

You would be most likely to find lead in the environment near which of these sites?
A)pesticide-producing factory
B)coal-burning plant
C)dump for old electronic equipment
D)site of an old marine fueling dock
12

The seaweed Caulerpa taxifolia is a pest because it
A)releases toxins into the water.
B)invades and clogs pipes.
C)smothers native species.
D)harbors disease-causing bacteria.
13

The size and shape of barrier islands
A)are always changing.
B)can be controlled by building seawalls and jetties.
C)are stabilized by dunes for long periods of time.
D)remain the same unless the land is developed.
14

If one intends to attempt habitat restoration, one must not
A)use artificial substrates, such as concrete blocks.
B)reopen connections to the open sea.
C)introduce invasive species.
D)release small fishes that were raised in culture.
15

The Convention on International Trade in Endangered Species and the U.S. Çustoms Office have laws that prevent travelers from bringing back endangered species or their products to the U.S.A. Which of these items do you think is legal to bring back with you?
A)dried corals
B)soap containing seaweed extracts
C)shells of sea turtles
D)canned whale meat





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