AnswersIC Environmental Science - DeeringFire and Nature

Topic Test Answers

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1
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Which of the following is not true concerning rainforests?

A
Twenty-five percent of western pharmaceuticals are derived from rainforest ingredients.
B
Almost 50,000 rainforest species are lost every year due to deforestation.
C
Half of all rainforest plants have been tested for their medicinal properties.
D
Projections say rainforest deforestation could eliminate half of the world’s species.
2
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Which of the following statements about human impact on trees is true?

A
Human activity always has a negative impact on trees.
B
All human uses of trees require destruction of the trees.
C
Human activity has had both a positive and negative impact on trees.
D
Cutting down trees is the only activity that has a negative impact on trees.
3

Rainforests are not exclusively found near the equator.

T
T
F
F
4

What percent of the trees cut down are used for something other than paper?

A
35%
B
45%
C
55%
D
65%
5

What is the effect of wildfires on biodiversity?

A
temporary decrease, but long-term increase
B
temporary increase, but long-term decrease
C
increases
D
decreases
6

Which of the following statements about wildfires in deciduous forests is not true?

A
Deciduous forests are unaffected by wildfires.
B
Lichen and moss growth increases in deciduous forests as a result of wildfires.
C
Nutritional quality of new growth increases temporarily after a wildfire.
D
The quantity of trees in deciduous forests is unaffected when it occurs less than once every five years.
7

Which of the following statements about forestry education is true?

A
All educational facilities cover forestry to the same depth.
B
Individuals can pursue doctorates in forestry in any state.
C
Program focus will remain the same from state to state.
D
Some states have greater access to forestry programs than others.
8

Which of the following forest management practices is the most harmful to forest ecosystems?

A
clearcutting
B
shelterwood cutting
C
group selection
D
single tree selection
9

Using prescribed wildfires can prevent natural wildfires from posing as great a risk to property owners.

T
T
F
F
10

How do trees improve water quality?

A
Tree roots anchor soil in place, preventing runoff.
B
Water is filtered as it passes through the root systems of trees.
C
An adult tree can store nearly 250 gallons of water.
D
All of the above
11

How do trees interact with other organisms?

A
They provide mammals with food.
B
They receive shelter from insects.
C
They obtain food from other plants.
D
All of the above
12

The promotion of companies’ sustainably harvested rainforest products is intended to _______.

A
produce cheaper products
B
promote overconsumption
C
give the company a competitive advantage
D
produce more expensive products
13

Which of the following best describes the use of rainforest plants as anticancer drugs?

A
Most rainforest plants have been tested for their cancer fighting properties.
B
Twenty-five percent of the active ingredients in cancer drugs are exclusively rainforest plants.
C
The most powerful anticancer drugs are not rainforest plants.
D
All of the above
14

The main characteristic of a carbon sink is that _______.

A
it emits no carbon
B
it absorbs no carbon
C
it emits more carbon than it absorbs
D
it absorbs more carbon than it emits
15

When is the carbon stored in plants released?

A
during cellular respiration
B
during photosynthesis
C
when they die
D
none of the above
16

What are some possible consequences of preventing prescribed burns and natural wildfires?

Answer not available
17

As a result of wildfires, _______ in grasslands.

A
tree growth increases
B
grass growth increases
C
soil quality decreases
D
invertebrate variety decreases
18

Explain why rainforests are important to Western medicine.

Answer:

Twenty-five percent of Western pharmaceuticals are derived from rainforest ingredients. But since only a small fraction of rainforest organisms have been studied, as the rainforest species disappear so do potential cures and treatments for life-threatening diseases.

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