AnswersGV 2019 - MPS Environmental Science Semester 2 SC631Pools, Ponds, and Lakes

Pools, Ponds, and Lakes Answers

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1
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An increase in the number of phytoplankton in an aquatic ecosystem is always beneficial.

A
T
B
F
2
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What important function do stream pools serve?

A
Stream pools serve as a habitat for juvenile fish.
B
Stream pools serve as a habitat for organisms that have difficulty in feeding or navigating swifter areas of the stream.
C
They have greater depth and lower velocity than other parts of the stream, thus allowing a habitat for organisms during dryer seasons.
D
All of the above
3

Eutrophication is caused by _______.

A
an increase in nutrients
B
a decrease in nutrients
C
the introduction of new species of animals
D
the introduction of new species of plants
4

How are littoral and riparian zones different?

A
Littoral zones contain vegetation, while riparian zones do not.
B
Littoral zones have greater access to sunlight than riparian zones.
C
Riparian zones are more important to aquatic animals than littoral zones.
D
Riparian zones occur where water meets land, while littoral zones occur at depths of less than 15 feet.
5

Plankton are most commonly found in the _______.

A
pelagic zone
B
littoral zone
C
benthic zone
D
all of the above
6

Riparian zones are important to the natural environment because they _______.

A
contain pollution from runoff
B
reduce soil erosion
C
support diverse organisms
D
all of the above
7

Most aquatic plant life can be found in the littoral zone.

A
T
B
F
8

Littoral zones are more likely to contain vegetation than riparian zones.

A
T
B
F
9

Why are living organisms more common in the littoral zone than in the benthic zone?

A
The benthic zone has less light penetration.
B
The littoral zone has a variety of plants.
C
The littoral zone provides more resources.
D
All of the above
10

Which of the following statements about eutrophication is true?

A
Eutrophication occurs when excess nutrients are present in aquatic ecosystems, resulting in the increased production of plant life and the subsequent increase in the oxygen levels of the water.
B
Eutrophication occurs when excess nutrients are present in aquatic ecosystems, resulting in the increased production of plant life and the subsequent decrease in the oxygen levels of the water.
C
Eutrophication involves the overpopulation of aquatic ecosystems with plant and animal life.
D
Eutrophication is rarely caused by human activity.

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