Question 1

In the eighteenth and nineteenth centuries, people increased Earth's capacity to support more humans through advances.

Accepted Answer

A)  demographic 
B)  psychological 
C)  social- medical 
D)  cultural 
E)  industrial- agricultural

Question 2

A population size will remain stable if

Accepted Answer

A)  the population grows by a fixed percentage of its size each year. 
B)  the number of births each year is constant and the birth rate is higher than the death rate. 
C)  the birth and death rates are equal, as are the rates of emigration and immigration. 
D)  environmental resistance declines each year. 
E)  the rate of emigration is higher than the rate of immigration.

Question 3

Developing countries tend to have a(n) age structure diagram.

Accepted Answer

A)  inverted- triangle- shaped 
B)  rectangular 
C)  triangular- shaped 
D)  round 
E)  square

Question 4

Schools of fish typically exhibit a distribution pattern.

Accepted Answer

A)  uniform 
B)  J- curve 
C)  clumped 
D)  scrambled 
E)  random

Question 5

A forest fire is a density- independent population control factor.

Accepted Answer

A) True 
 B)False

Question 6

The population shown in the pyramid is

Accepted Answer

A)  showing continuous exponential growth. 
B)  going through a boom- and- bust cycle. 
C)  stable, or slowly growing. 
D)  expanding. 
E)  decreasing.

Question 7

A measure of the ability of a population to grow under ideal circumstances (maximum birth rate and minimum death rate) is its .

Accepted Answer

The answer of A measure of the ability of a...

Question 8

What term describes the maximum population size that the environment can support indefinitely?

Accepted Answer

The answer of What term describes the maximum population size...

Question 9

Floods and fires are examples of , which can dramatically and unpredictably reduce populations.

Accepted Answer

A)  biotic factors 
B)  environmental resistance 
C)  demographic factors 
D)  logistic growth factors 
E)  density- dependent factors

Question 10

A species that is transferred to a new environment where it has little environmental resistance and experiences an explosive population growth is called a(n) species.

Accepted Answer

The answer of A species that is transferred to a...

Question 11

When mosquitoes are abundant, purple martins flock to the area and feed exclusively on them. When mosquito populations are not large, purple martins are similarly scarce and feed on other insects. This is an example of

Accepted Answer

A)  density- independent regulation. 
B)  exotic regulation. 
C)  density- dependent regulation. 
D)  community carrying capacity. 
E)  ecosystem carrying capacity.

Question 12

When resources are limited but spread evenly throughout a region, plants are likely to form a uniform distribution pattern.

Accepted Answer

A) True 
 B)False

Question 13

Human populations have continued to grow because humans have increased Earth's through agriculture, medicine, and technology.

Accepted Answer

The answer of Human populations have continued to grow because...

Question 14

The different species within an ecosystem that interact in various ways make up a(n)

Accepted Answer

A)  trophic level. 
B)  population. 
C)  ecotone. 
D)  community. 
E)  aggregation.

Question 15

If the individuals of a species are likely to live until old age, that species exhibits a(n) survivorship curve.

Accepted Answer

A)  early- loss 
B)  late- loss 
C)  declining 
D)  constant- loss 
E)  S- shaped

Question 16

Based on the data in the table, this population has a growth pattern.

Accepted Answer

A)  J- curve 
B)  scramble competition 
C)  boom- and- bust 
D)  replacement- level fertility 
E)  S- curve

Question 17

The growth rate of a population is the difference between the population size and the death rate.

Accepted Answer

A) True 
 B)False

Question 18

An ecologist is studying the painted turtle population in a small pond. At the beginning of the year, there are 100 individuals. Over the course of a year, 40 turtles are born and 60 die. There is no migration. What is the birth rate per year for this population?

Accepted Answer

A)  20 
B)  0.6 
C)  0.4 
D)  60 
E)  40

Question 19

Humans are classified as a late- loss population.

Accepted Answer

A) True 
 B)False

Question 20

In the United States today, there is a trend toward women having their first child in their late 30s or early 40s. In contrast, a few decades ago, most women started having children in their early 20s. What effect would you expect this change to have on population growth in the United States? Would it have any effect if the number of children per woman remains the same? Explain.

Accepted Answer

The answer of In the United States today, there is...

Exam 27: Population Growth and Regulation

In the eighteenth and nineteenth centuries, people increased Earth's capacity to support more humans through advances.

A population size will remain stable if

Developing countries tend to have a(n) age structure diagram.

Schools of fish typically exhibit a distribution pattern.

A forest fire is a density- independent population control factor.

The population shown in the pyramid is

A measure of the ability of a population to grow under ideal circumstances (maximum birth rate and minimum death rate) is its .

What term describes the maximum population size that the environment can support indefinitely?

Floods and fires are examples of , which can dramatically and unpredictably reduce populations.

A species that is transferred to a new environment where it has little environmental resistance and experiences an explosive population growth is called a(n) species.

When mosquitoes are abundant, purple martins flock to the area and feed exclusively on them. When mosquito populations are not large, purple martins are similarly scarce and feed on other insects. This is an example of

When resources are limited but spread evenly throughout a region, plants are likely to form a uniform distribution pattern.

Human populations have continued to grow because humans have increased Earth's through agriculture, medicine, and technology.

The different species within an ecosystem that interact in various ways make up a(n)

If the individuals of a species are likely to live until old age, that species exhibits a(n) survivorship curve.

Based on the data in the table, this population has a growth pattern.

The growth rate of a population is the difference between the population size and the death rate.

An ecologist is studying the painted turtle population in a small pond. At the beginning of the year, there are 100 individuals. Over the course of a year, 40 turtles are born and 60 die. There is no migration. What is the birth rate per year for this population?

Humans are classified as a late- loss population.