AnswersFA Vandergrift Environmental Science 2026-27The Importance of Trees

The Importance of Trees — Unit test Answers

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21
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Which of the following is a technology used by foresters?

A
infrared photography
B
aerial photography
C
remote sensing
D
all of the above
22
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Victory gardens were used in World Wars I and II to augment the public food supply and aid the war effort.

A
T
B
F
23

Reforestation always occurs as a result of human intervention.

A
T
B
F
24

How does flooding rice fields reduce the need for herbicides and pesticides in rice farming?

A
While rice has a submerged growth state, most weeds and pests do not.
B
Flooding the fields causes the soil to degrade so weeds cannot take root.
C
Residual herbicides and pesticides from previous seasons dissolve in the water.
D
All of the above
25

Which of the following would most likely employ a forester?

A
state governments
B
lumber businesses
C
national governments
D
all of the above
26

Which method of tree harvesting favors slow-growing trees that are shade-tolerant?

A
selective cutting
B
clearcutting
C
shelterwood
D
none of the above
27

Why is clearcutting an especially damaging forestry practice for species that rely upon older trees for their survival?

A
Clearcutting removes all trees in a stand, old and young.
B
Clearcutting specifically removes older trees in a stand.
C
Clearcutting forces younger trees to mature faster.
D
Clearcutting is not a damaging forestry practice.
28

The fruit of trees is the only part that is used by humans for food.

A
T
B
F
29

Human impact on trees has been completely negative.

A
T
B
F
30

Genetically modified foods can contain genes from different, unrelated organisms.

A
T
B
F
31

Crop rotation is a method of soil conservation because _______.

A
the land produces more than one type of crop
B
it requires plowing and tilling that reduces soil compaction
C
it does not use the same parcel of land in sequential seasons
D
it avoids the depletion of soil nutrients
32

Why are biopharmaceuticals in high demand?

A
Biopharmaceuticals are easier to produce in mass quantities than pharmaceuticals derived from animals.
B
Biopharmaceuticals do not require testing before use.
C
Biopharmaceuticals are expensive to produce but worth the benefits.
D
All of the above
33

How does seed-cutting differ from shelterwood cutting?

A
Shelterwood cutting removes all trees within a given area.
B
Shelterwood cutting takes place over several years.
C
Seed-cutting takes place over several years.
D
Seed-cutting is more damaging to the natural environment.
34

Which of the following best explains how trees help conserve energy and reduce pollution in cities?

A
Trees shade buildings which reduces the use of energy derived from fossil fuels.
B
Trees remove carbon dioxide and add oxygen the atmosphere.
C
Trees filter particulates and polluting gases from the atmosphere.
D
All of the above
35

What distinguishes even-aged management practices from uneven-aged management practices?

A
Even-aged practices remove larger groups of trees than uneven-aged management practices.
B
Even-aged practices are similar to minor natural disturbances while uneven-aged practices are similar to major natural disturbances.
C
Even-aged practices leave areas with greater variance than uneven-aged practices.
D
All of the above
36

The same agricultural practices are used in every country of the world.

A
T
B
F
37

Why are environmentalists concerned about the introduction of genetically engineered trees?

A
Genetically engineered trees are not regulated.
B
Genetically engineered trees could have unexpected interactions with organisms of natural ecosystems.
C
Genetically engineered trees decrease the biodiversity of natural ecosystems.
D
All of the above
38

Which of the following is a way humans use trees?

A
paper
B
food
C
wood
D
all of the above
39

Which of the following is not an agricultural technique?

A
irrigation
B
selective breeding
C
livestock herding
D
none of the above
40

What is the purpose of strip cropping?

A
prevent soil erosion
B
maintain nutrient levels
C
reduce plant disease
D
all of the above

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