Question 1

What would be the "r" value or intrinsic rate of growth of a population that had 50 births and 40 deaths per year out of 1000?

Accepted Answer

0.01 or 1 ...

Question 2

A biologist is studying the population dynamics of pocket gophers in a meadow in central Oregon.She noted that,when population numbers are high,death rates from disease and starvation increase.This is an example of:

Accepted Answer

A)  r-selected growth.
B)  the principle of intrinsic rate of growth.
C)  exponential growth.
D)  density dependent control.E) All of the above
F) A) and B)

Question 3

Studying the total amount of oxygen generated and released into the atmosphere by living things would be an example of studying ecology at which level?

Accepted Answer

A)  community
B)  population
C)  ecosystem
D)  biosphereE) None of the above
F) C) and D)

Question 4

Which of the following is true of exponential growth?

Accepted Answer

A)  Exponential growth occurs when there are many environmental limits to reproduction.
B)  Exponential growth resembles an S-shaped curve when plotted on a graph.
C)  Exponential growth is growth that continues accelerating with time.
D)  Exponential growth resembles a straight line when plotted on a graph.E) B) and D)
F) None of the above

Question 5

Oak trees grow slowly and put a lot of resources into the trunk,bark,and roots.Seeds are relatively heavy.In the plant kingdom,oaks might be considered:

Accepted Answer

A)  density independent.
B)  r-selected.
C)  opportunistic.
D)  K-selected.E) A) and D)
F) A) and C)

Question 6

A population of rabbits introduced to an island grows rapidly for a few years,and then growth slows and stabilizes.The population becomes stable because:

Accepted Answer

A)  the intrinsic rate of increase has declined.
B)  environmental resistance declined.
C)  immigration was reduced.
D)  the carrying capacity has been reached.E) C) and D)
F) A) and D)

Question 7

If a population's death rate is 5 percent and birth rate is 10 percent,its r value would be:

Accepted Answer

A)  15 percent.
B)  5 percent.
C)  50 percent.
D)  essentially zero.E) A) and B)
F) A) and C)

Question 8

K,in population growth equations,refers to:

Accepted Answer

A)  carrying capacity.
B)  the predation factor.
C)  environmental resistance.
D)  biotic potential.E) A) and C)
F) A) and D)

Question 9

Per capita use of resources and CO₂ emissions may be just as important as population size when considering stress to the global environment.

Accepted Answer

A) True 
 B)False

Question 10

Define the term biosphere.

Accepted Answer

The biosphere is the...

Question 11

Compare the trends seen in the characteristics of r-selected and K-selected species,also noting exceptions learned in your study of population ecology.

Accepted Answer

K-selected organisms tend to be larger o...

Question 12

Life tables are used to predict how many individuals will be born in any specific year.

Accepted Answer

A) True 
 B)False

Question 13

Which of the following might cause an exponential increase in deer populations across the United States?

Accepted Answer

A)  reduction in parasites that are found in emaciated deer
B)  reduction in the population of wolves and bobcats
C)  increase in atmospheric carbon dioxide levels
D)  improvement in forest soilE) All of the above
F) A) and D)

Question 14

Environmental pressures on a population,such as temperature and pH,are density ________ factors.

Accepted Answer

The answer of Environmental pressures on a population,such as temperature...

Question 15

Elephants are good examples of r-selected species.

Accepted Answer

A) True 
 B)False

Question 16

Why are K-selected species also known as equilibrium species?

Accepted Answer

Their populations te...

Question 17

Which of the following is true of logistic growth?

Accepted Answer

A)  Logistic growth occurs when predators are very limited in population size.
B)  Logistic growth may start in a way that resembles exponential growth but slows and stabilizes.
C)  Logistic growth describes the growth of a population in an environment with an unlimited carrying capacity.
D)  Logistic growth is plotted as a J-shaped curve.E) B) and C)
F) None of the above

Question 18

Equilibrium species are usually limited by density dependent factors.

Accepted Answer

A) True 
 B)False

Question 19

A negative rate of increase,or a negative r,means that:

Accepted Answer

A)  the population is shrinking.
B)  the population has a short generation time.
C)  death rates have decreased.
D)  there is zero population growth.E) B) and C)
F) All of the above

Question 20

Which of the following would be an example of environmental resistance?

Accepted Answer

A)  food supply increasing along with a population
B)  bacteria populations producing more toxic waste as they grow
C)  slow gestation periods
D)  life span that increases with population sizeE) B) and C)
F) None of the above

Exam 34: An Interactive Living World 1: Populations in Ecology

Life tables are used to predict how many individuals will be born in any specific year.

Correct AnswerverifiedShow Answer

What would be the "r" value or intrinsic rate of growth of a population that had 50 births and 40 deaths per year out of 1000?

Correct Answerverified0.01 or 1 ...View AnswerShow Answer

A biologist is studying the population dynamics of pocket gophers in a meadow in central Oregon.She noted that,when population numbers are high,death rates from disease and starvation increase.This is an example of:

Correct AnswerverifiedShow Answer

Per capita use of resources and CO₂ emissions may be just as important as population size when considering stress to the global environment.

Correct AnswerverifiedShow Answer

A population of rabbits introduced to an island grows rapidly for a few years,and then growth slows and stabilizes.The population becomes stable because:

Correct AnswerverifiedShow Answer

K,in population growth equations,refers to:

Correct AnswerverifiedShow Answer

Equilibrium species are usually limited by density dependent factors.

Correct AnswerverifiedShow Answer

Compare the trends seen in the characteristics of r-selected and K-selected species,also noting exceptions learned in your study of population ecology.

Correct AnswerverifiedK-selected organisms tend to be larger o...View AnswerShow Answer

Environmental pressures on a population,such as temperature and pH,are density ________ factors.

Correct AnswerverifiedShow Answer

A negative rate of increase,or a negative r,means that:

Correct AnswerverifiedShow Answer

Elephants are good examples of r-selected species.

Correct AnswerverifiedShow Answer

Oak trees grow slowly and put a lot of resources into the trunk,bark,and roots.Seeds are relatively heavy.In the plant kingdom,oaks might be considered:

Correct AnswerverifiedShow Answer

Which of the following would be an example of environmental resistance?

Correct AnswerverifiedShow Answer

Studying the total amount of oxygen generated and released into the atmosphere by living things would be an example of studying ecology at which level?

Correct AnswerverifiedShow Answer

Define the term biosphere.

Correct AnswerverifiedThe biosphere is the...View AnswerShow Answer

Which of the following is true of exponential growth?

Correct AnswerverifiedShow Answer

Which of the following might cause an exponential increase in deer populations across the United States?

Correct AnswerverifiedShow Answer

Why are K-selected species also known as equilibrium species?

Correct AnswerverifiedTheir populations te...View AnswerShow Answer

If a population's death rate is 5 percent and birth rate is 10 percent,its r value would be:

Correct AnswerverifiedShow Answer

Which of the following is true of logistic growth?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified
0.01 or 1 ...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
K-selected organisms tend to be larger o...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
The biosphere is the...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Their populations te...
View Answer

Correct Answer
verified

Correct Answer
verified