AnswersIC Environmental Science - DeeringFire and Nature

Fire and Nature Answers

27 verified answers1 views
1
Free Preview

Wildfires open a new seedbed that can be used for new plant growth.

A
T
B
F
2
Free Preview

How do wildfires help control plant disease?

A
Wildfires are more likely to kill off plants that are likely to spread disease.
B
Wildfires help control populations of fungi and insects that can lead to plant disease.
C
Wildfires thin underbrush which leads to plant disease.
D
All of the above
3

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

A
T
B
F
4

Which of the following statements about wildfires is true?

A
Wildfires allow certain plant types to reproduce by cracking their seeds.
B
Natural wildfires should be prevented to maintain wildlife habitats.
C
The loss of undergrowth caused by wildfires is detrimental to an ecosystem.
D
All of the above
5

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
6

Fire ecology is _______.

A
an old branch of science
B
a way for scientists to prevent accidental wildfires
C
the study of how fire affects ecosystems
D
all of the above
7

Which of the following statements about prescribed burns is true?

A
Prescribed burns will always have detrimental effects on ecosystems, but should be used to protect homes.
B
Prescribed burns are necessary for preventing natural wildfires.
C
Prescribed burns can help maintain healthy ecosystems.
D
None of the above
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

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
10

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
11

Rainforests are not exclusively found near the equator.

A
T
B
F
12

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

A
35%
B
45%
C
55%
D
65%
13

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
14

Why have forest fires in ponderosa pine forests become more damaging to that ecosystem than they were historically?

A
Following a policy of fire suppression in these forests makes fires burn hotter.
B
Fires in ponderosa pine forests are generally low-intensity fires.
C
Following a policy of fire suppression in these forests clears out underbrush..
D
Forest fires are a natural part of ponderosa pines forest ecosystems.
15

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.
16

Soil _______ as a result of wildfires in grasslands.

A
improves
B
degrades
C
is unchanged
D
is lost
17

What is a likely consequence of preventing prescribed burns to forest ecosystems?

A
Natural wildfires will burn longer and hotter when they occur because there is more underbrush and fuel available.
B
Forest ecosystems will remain healthier overall, due to retention of habitats.
C
Home owners will be better protected against damage from natural wildfires.
D
Natural wildfires will occur less frequently.
18

Which of the following statements about the use of prescribed fires in the Everglades is true?

A
It controls the amount of moisture in the environment.
B
It controls the spread of exotic organisms.
C
It helps maintain plant communities.
D
All of the above
19

How does wildfire help restore soil nutrients?

A
Wildfire kills off the soil organisms that consume soil nutrients.
B
Wildfires restore soil nutrients by decreasing the amount of underbrush in forests that contribute to nutrient loss.
C
Wildfires break down organic material faster than decomposition, thus renewing soil nutrients more quickly.
D
All of the above
20

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.

Did you find these answers helpful?

More from this Course

Quiz
17 verified answers

Soil and Agriculture

Quiz
17 verified answers

The Importance of Trees

Quiz
17 verified answers

Soil and Agriculture