Answers5120VB Environmental Science Sem B- BTopic Test

Topic Test Answers

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41
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The principle difference between where salt marshes and mangrove forests grow is _______.

A
the salinity of the water
B
the amount of sunlight the plants receive
C
the intensity of the waves along the coast
D
the extent of human development in the area
42
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Which of the following is not true concerning marine microbes?

A
They account for up to 90 percent of the ocean biomass.
B
They play a minor role in biological and geochemical cycles.
C
They are a potential source of new classes of antibiotics.
D
They may posses genes that will help scientists combat global climate change.
43

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44

Which of the following statements about coral reef preservation efforts is true?

A
In order to preserve coral reefs, all aquarium trade in coral reef organisms must end.
B
Legislation has had no impact on coral reef preservation efforts.
C
Various preservation methods have had some positive impact on coral reef preservation.
D
Education of fishermen has eliminated all coral reef loss.
45

It is crucial to study ocean microbes because _______.

A
they control the major biogeochemical cycles that keep Earth’s biosphere in balance
B
they are a significant source of greenhouse gases and pollution
C
they are frequently used as food sources in developing nations
D
they provide a significant alternative energy source used to replace coal and oil
46

The traditional view of mangrove forests as wastelands and unhealthy environments helped promote their degradation because _______.

A
mangrove forests are unproductive, unhealthy habitats
B
people did not feel it was necessary to preserve them
C
mangrove forests do not need to be preserved
D
all of the above
47

It is best to say that marine debris _______.

A
is a hazard to marine animals
B
degrading ocean health
C
a pervasive, global pollution problem
D
all of the above
48

In the science laboratory setting, scientists often struggle to achieve valid results. A possible solution for this dilemma is to repeat the procedure for several trials.

A
T
B
F
49

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Answer not available
50

Which of the following best defines sustainable fishing practices?

A
Harvesting practices that maximize yields and profits.
B
Harvesting practices that maximize the yield per fisherman.
C
Harvesting practices that do not reduce the potential for future harvests.
D
Harvesting practices that reduce the potential for future harvests.
51

Salt marshes are found _______.

A
at high elevations
B
away from the coast
C
on high energy coastlines
D
on low energy coastlines
52

Which of the following is most negatively affected by fishing practices?

A
deep sea corals
B
ocean microbes
C
methane hydrates
D
autonomous underwater explorers
53

Aquatic organisms have only a predatory relationship with coral reefs.

A
T
B
F
54

The Little River Salt Marsh Restoration Project centered around replanting marsh sedges and grasses.

A
T
B
F
55

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Answer not available
56

What record did the Nereus break in May 2009?

A
It became the first remote operated deep-sea robot.
B
It dove to a depth of 6.8 miles.
C
It explored an undersea mountain.
D
It took the first videos of deep sea organisms.
57

Ocean exploration is limited by _______.

A
lack of technology
B
expense
C
favorable weather conditions
D
all of the above
58

Which of the following does not explain the importance of mangrove forests?

A
They provide shelter to organisms on high energy coasts.
B
They help prevent erosion along coasts.
C
They increase surface runoff and flooding.
D
They filter and process pollutants out of the environment.
59

A strategy to reduce, reuse, and recycle would improve ocean health by _______.

A
removing marine debris from the oceans
B
reducing the amount of garbage available to enter the ocean
C
removing garbage from landfills
D
increasing the rate of plankton growth
60

Which of the following is not one of the three major structures of coral reefs?

A
planulae
B
fringing
C
barrier
D
atoll

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