Question 1

If there are 100 people living in a 2-square-kilometer area,the population density in people per square kilometer would be ________.

Accepted Answer

The answer of If there are 100 people living in...

Question 2

A relationship between birth rate and population density exists,for example,in the plantain weed Plantago major; as densities increase,birth rates ________.

Accepted Answer

The answer of A relationship between birth rate and population...

Question 3

If everyone lived a lifestyle as consumptive as American college students,the total acreage required would be the equivalent of ________ Earths.

Accepted Answer

The answer of If everyone lived a lifestyle as consumptive...

Question 4

Which density-dependent process contributed most significantly to the recovery of the North American monarch butterfly population after the severe winter losses of 2002?

Accepted Answer

A)  Unusually mild weather in the eastern United States greatly improved juvenile butterfly survival. 
B)  Butterfly predators starved when the monarch population dropped, and by the time it had recovered, Monarch population numbers were back up. 
C)  Egg production is inversely proportional to density; the surviving monarchs had ample resources and experienced maximal reproduction. 
D)  With fewer returning adults, there was less competition for food among the young caterpillars, and their survival rate was unusually high.

Question 5

The top of the "S" in an S-shaped curve indicates that the population

Accepted Answer

A)  is on the verge of collapse. 
B)  is experiencing abnormally heavy mortality pressure from predators or disease. 
C)  has reached its carrying capacity. 
D)  is poised for further exponential growth.

Question 6

The ecological footprint of a typical college student in the United States is about the same as a typical college student at a university in China.

Accepted Answer

A) True 
 B)False

Question 7

A flock of geese (Flock A)has 100 individuals and an annual growth rate,r,of 1.5.Another flock (Flock B)has 200 individuals and an r of .7.Flock C has a population of 75 and an r of 2.Flock D has a population of 50 and an r of 4.Assuming no other factors are involved,which herd will be largest next year?

Accepted Answer

A)  Flock A 
B)  Flock B 
C)  Flock C 
D)  Flock D

Question 8

The maximum population size that can be supported by its habitat is known as

Accepted Answer

A)  maximum increase. 
B)  carrying capacity. 
C)  exponential growth. 
D)  population balance.

Question 9

Billions of people throughout the world currently consume insects and this number will likely increase if population growth trends continue upward.Consuming insects makes good sense for all of the following reasons EXCEPT

Accepted Answer

A)  insects are highly nutritious with a protein content equal to conventional foods. 
B)  insects are abundant and typically have very high population growth rates. 
C)  insects can be grown, harvested, and processed with relatively little environmental impact. 
D)  consuming insects helps reduces their overall impact as pest organisms.

Question 10

A population of 100 individuals has a doubling time of 25 years.What size will this population be in 100 years?

Accepted Answer

A)  100 
B)  400 
C)  800 
D)  1,600

Question 11

Humans appear to be the only species not subject to limits on the size of its population.

Accepted Answer

A) True 
 B)False

Question 12

A population of 100 individuals is undergoing exponential growth,with a constant growth rate of 0.2 per year.What size will this population be in 2 years?

Accepted Answer

A)  100 
B)  120 
C)  144 
D)  200

Question 13

The rates of population growth and emigration are directly proportional.

Accepted Answer

A) True 
 B)False

Question 14

Nene,the Hawaiian goose,live in the wild on Hawaii,Maui,Kauai,and Molokai.The population density on Maui is 0.227 birds per square kilometer,and the island is 1,830 square kilometers in size.Approximately how many nene live on Maui?

Accepted Answer

A)  16 
B)  150 
C)  415 
D)  12,400

Question 15

Density-dependent factors are more likely to limit population growth when

Accepted Answer

A)  there are many individuals living in a fixed amount of space. 
B)  the population moves into a larger habitat. 
C)  food is abundant. 
D)  weather conditions become milder.

Question 16

A new species is introduced into a given area.The population size begins to grow slowly,then at a very rapid rate,and finally levels off at a stable number.This growth pattern is best represented by a(n)

Accepted Answer

A)  oscillating cycle. 
B)  J-shaped population curve. 
C)  A-shaped population curve. 
D)  S-shaped population curve.

Question 17

Once a population reaches its carry capacity,its size will remain stable indefinitely.

Accepted Answer

A) True 
 B)False

Question 18

Biologists estimate that the human population on Easter Island declined by 90 percent during the 200-year period between AD 1400 and 1600; what accounts for the crash of this population?

Accepted Answer

A)  the introduction of novel diseases brought by visiting Polynesians 
B)  expanding forests and the consequent loss of farmland 
C)  the aftermath of a volcanic eruption 
D)  deforestation, soil erosion, and resource depletion

Question 19

When the combination of death and emigration rates is lower than the combination of birth and immigration rates,the population will ________.

Accepted Answer

The answer of When the combination of death and emigration...

Question 20

Food production and consumption are not well matched throughout the world; preventing mass starvation would be possible if nontraditional food sources could be developed.One of the most promising,because they grow quickly and have a high protein content,is ________.

Accepted Answer

The answer of Food production and consumption are not well...

Exam 21: Growth of Populations

If there are 100 people living in a 2-square-kilometer area,the population density in people per square kilometer would be ________.

A relationship between birth rate and population density exists,for example,in the plantain weed Plantago major; as densities increase,birth rates ________.

If everyone lived a lifestyle as consumptive as American college students,the total acreage required would be the equivalent of ________ Earths.

Which density-dependent process contributed most significantly to the recovery of the North American monarch butterfly population after the severe winter losses of 2002?

The top of the "S" in an S-shaped curve indicates that the population

The ecological footprint of a typical college student in the United States is about the same as a typical college student at a university in China.

The maximum population size that can be supported by its habitat is known as

Billions of people throughout the world currently consume insects and this number will likely increase if population growth trends continue upward.Consuming insects makes good sense for all of the following reasons EXCEPT

A population of 100 individuals has a doubling time of 25 years.What size will this population be in 100 years?

Humans appear to be the only species not subject to limits on the size of its population.

A population of 100 individuals is undergoing exponential growth,with a constant growth rate of 0.2 per year.What size will this population be in 2 years?

The rates of population growth and emigration are directly proportional.

Nene,the Hawaiian goose,live in the wild on Hawaii,Maui,Kauai,and Molokai.The population density on Maui is 0.227 birds per square kilometer,and the island is 1,830 square kilometers in size.Approximately how many nene live on Maui?

Density-dependent factors are more likely to limit population growth when

A new species is introduced into a given area.The population size begins to grow slowly,then at a very rapid rate,and finally levels off at a stable number.This growth pattern is best represented by a(n)

Once a population reaches its carry capacity,its size will remain stable indefinitely.

Biologists estimate that the human population on Easter Island declined by 90 percent during the 200-year period between AD 1400 and 1600; what accounts for the crash of this population?

When the combination of death and emigration rates is lower than the combination of birth and immigration rates,the population will ________.

Food production and consumption are not well matched throughout the world; preventing mass starvation would be possible if nontraditional food sources could be developed.One of the most promising,because they grow quickly and have a high protein content,is ________.