The Importance of Water — Unit test Answers

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1
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Which of the following best explains why deforestation increases the risk of floods in an area?

A
Tree leaves catch and retain rain water.
B
Trees block the free flow of water.
C
Deforestation increases precipitation.
D
Tree roots improve soil water retention.
2
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The marine biome is the largest of all the ecosystems.

A
T
B
F
3

If a stationary body of water has a constant temperature from top to bottom it is most likely a(n) _______.

A
lake
B
pond
C
ocean
D
lagoon
4

Which of the following typical adaptations of marine animals is not found in sea otters?

A
streamlined body
B
webbed hands and feet
C
body covered in thick fur
D
breathing apparatus on the top of the head
5

Variation of ecological habitats within a species is characteristic of which type of diversity?

A
Genetic diversity
B
Ecosystem diversity
C
Species diversity
D
Regional diversity
6

Which of the following is not an example of interactions between biotic and abiotic factors in an ecosystem?

A
flowers opening at dawn and closing at night
B
bears hibernating in winter
C
male elk fighting over a female
D
Monarch butterflies migrating to Mexico for the winter
7

Which of the following is a specialist species?

A
Giant Pandas
B
Horses
C
Humans
D
Rabbits
8

Changes to _______ can be ascribed to glacial melting.

A
Earth’s surface
B
CO2 levels
C
coral reefs
D
water pollution
9

The inversion of terrestrial and aquatic energy pyramids is dependent upon the nature of that environment’s particular _______.

A
decomposers
B
climate
C
primary consumers
D
producers
10

Hurricanes are more destructive than tornados due to _______.

A
coastal storm surges
B
their shorter duration
C
the combination of high winds and flood waters
D
all of the above
11

Sedimentation accumulation found in bodies of water can be the result of _______.

A
fertilizer runoff
B
pesticides and herbicides
C
erosion from agricultural practices
D
all of the above
12

How can an increase in biodiversity lead to an increase in ecosystem stability?

A
A more biodiverse ecosystem is not subject to change.
B
A more biodiverse ecosystem has a higher chance of adapting to species changes.
C
A more biodiverse ecosystem has fewer species types to balance.
D
A more biodiverse ecosystem is subject to fewer natural disasters.
13

Consider the following food chain:Garden plants are eaten by snails, which are eaten by birds, which are eaten by the household cat.

A
A
B
B
C
C
D
D
14

Predict the likely effect of continued deforestation on plant and animal life.

Answer not available
15

If a deer eats grass, what percentage of energy will the deer acquire from the grass?

A
0.1 percent
B
1 percent
C
10 percent
D
100 percent

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