Question 1

Which of the following statements accurately describes information shown in this figure?

Accepted Answer

A) The population size in China is over 400 million people. 
B) The population size in China has increased most quickly in eastern China. 
C) The population density is highest in western China. 
D) The population density is highest along the eastern coast of China. 
A) The population size in China is over 400 million people. 
B) The population size in China has increased most quickly in eastern China. 
C) The population density is highest in western China. 
D) The population density is highest along the eastern coast of China. D

Question 2

A population is counted at 100 individuals in 1998. In 2006, a new count found 1,600 individuals. What is the doubling time for the population?

Accepted Answer

A) 0.5 year 
B) 1 year 
C) 1.5 years 
D) 2 years 
A) 0.5 year 
B) 1 year 
C) 1.5 years 
D) 2 years D

Question 3

According to the figure shown, human populations are projected to reach carrying capacity in approximately ________ years.

Accepted Answer

A) 15 
B) 35 
C) 75 
D) 85 
A) 15 
B) 35 
C) 75 
D) 85 B

Question 4

In November 2013, the one-child policy was officially relaxed to allow a second birth to some couples. Which of the following couples are now allowed a second birth?

Accepted Answer

A) couples in which one parent is an only child 
B) couples in which both parents are only children 
C) couples in which one parent is an orphan 
D) couples in which both parents are orphans 
A) couples in which one parent is an only child 
B) couples in which both parents are only children 
C) couples in which one parent is an orphan 
D) couples in which both parents are orphans

Question 5

Which of the following pieces of information would be most useful in determining whether a population is undergoing logistic growth versus exponential growth?

Accepted Answer

A) total population size taken during a current census 
B) population doubling time 
C) the carrying capacity for the same species in a different environment 
D) the shape of the growth curve for the population over time 
A) total population size taken during a current census 
B) population doubling time 
C) the carrying capacity for the same species in a different environment 
D) the shape of the growth curve for the population over time

Question 6

Which of the following is a true statement?

Accepted Answer

A) The population density is equal across all areas of China. 
B) China has the largest human population in the world. 
C) China's one-child policy allows one birth per couple every ten years. 
D) Chinese citizens are allowed to apply for a waiver if they want multiple children. 
A) The population density is equal across all areas of China. 
B) China has the largest human population in the world. 
C) China's one-child policy allows one birth per couple every ten years. 
D) Chinese citizens are allowed to apply for a waiver if they want multiple children.

Question 7

When an isolated population reaches its carrying capacity

Accepted Answer

A) the birth rate > the death rate. B) the birth rate = the death rate. C) the birth rate < the death rate. D) It is not possible to generalize these values. A) the birth rate > the death rate. B) the birth rate = the death rate. C) the birth rate < the death rate. D) It is not possible to generalize these values.

Question 8

Studies of the population-size cycles seen between the snowshoe hare and the Canadian lynx showed that

Accepted Answer

A) lynx populations decrease in size when hare populations increase in size. 
B) lynx populations increase in size when hare populations decrease in size. 
C) lynx populations decrease in size when hare populations decrease in size. 
D) There is no relationship between population sizes of snowshoe hare and Canadian lynx. 
A) lynx populations decrease in size when hare populations increase in size. 
B) lynx populations increase in size when hare populations decrease in size. 
C) lynx populations decrease in size when hare populations decrease in size. 
D) There is no relationship between population sizes of snowshoe hare and Canadian lynx.

Question 9

The carrying capacity for Paramecia caudatum as shown in this figure is

Accepted Answer

A) 12 days. 
B) 200/ml of medium. 
C) 100/ml of medium. 
D) 24 days. 
A) 12 days. 
B) 200/ml of medium. 
C) 100/ml of medium. 
D) 24 days.

Question 10

A population will remain at a constant size when emigration equals immigration and

Accepted Answer

A) food is not a limiting factor. 
B) births equal deaths. 
C) predators leave the area. 
D) available space remains the same. 
A) food is not a limiting factor. 
B) births equal deaths. 
C) predators leave the area. 
D) available space remains the same.

Question 11

Lynx feed on rabbits, and the growth curves for these two species fluctuate together. This relationship is an example of a(n)

Accepted Answer

A) S-shaped growth curve. 
B) J-shaped growth curve. 
C) irregular fluctuation. 
D) tightly linked cycle. 
A) S-shaped growth curve. 
B) J-shaped growth curve. 
C) irregular fluctuation. 
D) tightly linked cycle.

Question 12

A giant puffball mushroom is capable of producing and releasing trillions of spores. With this many spores produced, why do giant puffball mushrooms undergo logistic growth in established habitats?

Accepted Answer

A) Puffball mushrooms use chemicals to limit the number of spores that survive to ensure that adults have access to nutrients. 
B) The length of time for spore germination to occur is one factor that leads to logistic growth in all species. 
C) Limiting resources, such as food, water, and space control the maximum population size of all species. 
D) Mushrooms are biologically unique organisms that are incapable of experiencing exponential growth even in habitats with unlimited resources. 
A) Puffball mushrooms use chemicals to limit the number of spores that survive to ensure that adults have access to nutrients. 
B) The length of time for spore germination to occur is one factor that leads to logistic growth in all species. 
C) Limiting resources, such as food, water, and space control the maximum population size of all species. 
D) Mushrooms are biologically unique organisms that are incapable of experiencing exponential growth even in habitats with unlimited resources.

Question 13

Which of the following situations illustrates a link between the effects of density-dependent and density-independent factors?

Accepted Answer

A) A flood causes a river to overflow and drown a herd of deer. 
B) A drought occurs; a small herd of deer is able to survive, whereas a larger herd in the same area perishes. 
C) A population of deer increases to a size at which individuals are competing with each other to get enough food. 
D) None of the above are correct because density-dependent and density-independent factors cannot affect the same population of organisms at the same time. 
A) A flood causes a river to overflow and drown a herd of deer. 
B) A drought occurs; a small herd of deer is able to survive, whereas a larger herd in the same area perishes. 
C) A population of deer increases to a size at which individuals are competing with each other to get enough food. 
D) None of the above are correct because density-dependent and density-independent factors cannot affect the same population of organisms at the same time.

Question 14

Nene, Hawaiian geese, live on Maui. Their population density is approximately 0.2 per square kilometer and Maui is approximately 1,800 square kilometers in size. Approximately how many nene live on Maui?

Accepted Answer

A) 18 
B) 130 
C) 360 
D) 1,800 
A) 18 
B) 130 
C) 360 
D) 1,800

Question 15

The effects of pollution are generally considered to be density-independent because

Accepted Answer

A) the contamination level of any organism is unaffected by variations in population density. 
B) when food supplies become limited, the organisms are more likely to consume contaminated foods. 
C) at high densities the organisms are more likely to contact the pollutant. 
D) when the organisms are stressed by overcrowding, the pollutant becomes more toxic. 
A) the contamination level of any organism is unaffected by variations in population density. 
B) when food supplies become limited, the organisms are more likely to consume contaminated foods. 
C) at high densities the organisms are more likely to contact the pollutant. 
D) when the organisms are stressed by overcrowding, the pollutant becomes more toxic.

Question 16

In what year did China implement the one-child policy?

Accepted Answer

A) 1949 
B) 1967 
C) 1978 
D) 1994 
A) 1949 
B) 1967 
C) 1978 
D) 1994

Question 17

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

Accepted Answer

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

Question 18

Explain whether a death rate increase from influenza is an example of a density-dependent population change or a density-independent population change.

Accepted Answer

Influenza is a disease and, li

Question 19

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

Accepted Answer

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

Question 20

In the figure shown, the willow tree population leveled off at 475 trees and remained stable in the early 1980s. This most likely occurred because the

Accepted Answer

A) trees occupied all of the available space that willows were able to occupy. 
B) tree seedlings were shaded by the grasses shown in the illustration. 
C) population growth rate exceeded the death rate. 
D) trees depleted all of the nutrients in the soil and the trees could no longer grow. 
A) trees occupied all of the available space that willows were able to occupy. 
B) tree seedlings were shaded by the grasses shown in the illustration. 
C) population growth rate exceeded the death rate. 
D) trees depleted all of the nutrients in the soil and the trees could no longer grow.

Exam 16: Growth of Populations

Which of the following statements accurately describes information shown in this figure?

A population is counted at 100 individuals in 1998. In 2006, a new count found 1,600 individuals. What is the doubling time for the population?

According to the figure shown, human populations are projected to reach carrying capacity in approximately ________ years.

In November 2013, the one-child policy was officially relaxed to allow a second birth to some couples. Which of the following couples are now allowed a second birth?

Which of the following pieces of information would be most useful in determining whether a population is undergoing logistic growth versus exponential growth?

Which of the following is a true statement?

When an isolated population reaches its carrying capacity

Studies of the population-size cycles seen between the snowshoe hare and the Canadian lynx showed that

The carrying capacity for Paramecia caudatum as shown in this figure is

A population will remain at a constant size when emigration equals immigration and

Lynx feed on rabbits, and the growth curves for these two species fluctuate together. This relationship is an example of a(n)

A giant puffball mushroom is capable of producing and releasing trillions of spores. With this many spores produced, why do giant puffball mushrooms undergo logistic growth in established habitats?

Which of the following situations illustrates a link between the effects of density-dependent and density-independent factors?

Nene, Hawaiian geese, live on Maui. Their population density is approximately 0.2 per square kilometer and Maui is approximately 1,800 square kilometers in size. Approximately how many nene live on Maui?

The effects of pollution are generally considered to be density-independent because

In what year did China implement the one-child policy?

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

Explain whether a death rate increase from influenza is an example of a density-dependent population change or a density-independent population change.

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

In the figure shown, the willow tree population leveled off at 475 trees and remained stable in the early 1980s. This most likely occurred because the

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