AnswersGV 2019 - MPS Environmental Science Semester 2 SC631Issues Affecting Marine Ecosystems

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1
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The salinity in salt marshes can vary throughout the day because _______.

A
river flow changes throughout the day
B
the amount of salt water in a marsh depends upon ocean tides
C
daily winds and rains result in salt and fresh water mixing
D
salt water collects in the lowest elevations
2
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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.
3

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
4

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.
5

Aquatic organisms have only a predatory relationship with coral reefs.

A
T
B
F
6

Mangrove forests were traditionally viewed as _______.

A
unproductive wastelands
B
valuable fish habitats
C
an erosion preventing habitat
D
pollution filters
7

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
8

Which of the following best explains the role of deep sea coral reefs in the environment?

A
They are responsible for fouling fishing lines.
B
They are a quick-growing food source for deep water predators.
C
They provide a critical habitat for many other organisms.
D
They are a record of past climate conditions.
9

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.
10

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
11

Coral reef ecosystems support over a million different species. Please select the best answer from the choices provided

A
T
B
F
12

Coral bleaching occurs when a colony of polyps are under stress.

A
T
B
F
13

Methane hydrates are _______.

A
a potential new source of natural gas
B
the largest reserve of methane on Earth
C
releasing methane as the arctic warms
D
all of the above
14

Fish rely on coral for _______.

A
shelter
B
food supply
C
camouflage
D
all of the above
15

Which of the following best explains the environmental problems associated with trawling?

A
Trawling always destroys sea floor ecologies.
B
Trawling gathers fish indiscriminately.
C
Trawling is too selective at gathering fish.
D
All of the above
16

Which of the following is not a goal of the Seafood Watch program?

A
to promote sustainable fishing
B
to identify unsustainable sources of fish
C
to increase fish sales
D
to improve ocean health
17

Which of the following is not true concerning the Nereus?

A
It is able to dive deeper than any other man-made vehicle.
B
It will be used to explore previously unreachable areas of the ocean.
C
It is a combination automated and remote-operated vehicle.
D
It has the capacity to carry two crew members.
18

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.
19

Deep sea corals can be hundreds or thousands of years old.

A
T
B
F
20

Which of the following best explains the importance of studying the ocean carbon cycle?

A
The oceans have a significant impact on the levels of atmospheric gases.
B
It is a new field of ocean science.
C
The ocean releases one quarter of the carbon dioxide in the atmosphere.
D
All of the above

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