Question 1

If 100 bean seeds were planted in an area the size of your textbook and they all started to grow, you would expect

Accepted Answer

A)   the size of the population to increase.
B)   the biomass to decrease.
C)   the size of the population to decrease and the size of the biomass to increase.
D)   the size of the population to increase and the size of the biomass to decrease.E) B) and C)
F) A) and D)

Question 2

If 100 bean seeds were planted in an area the size of your textbook and they all started to grow, you would expect

Accepted Answer

A)   the population density to increase.
B)   the biomass to decrease.
C)   the population density to decrease and the size of the biomass to increase.
D)   the population density to increase and the size of the biomass to decrease.E) B) and D)
F) C) and D)

Question 3

The population will be largest during the

Accepted Answer

A)   lag phase.
B)   exponential growth phase.
C)   stable equilibrium phase.
D)   death phase.E) A) and B)
F) B) and C)

Question 4

A population is not changing in size during the ____ phase.

Accepted Answer

A)   death
B)   exponential
C)   stable equilibrium
D)   None of these answers is correct.E) None of the above
F) A) and B)

Question 5

Population control factors that arise from outside the population are called

Accepted Answer

A)   extrinsic limiting factors.
B)   density-independent limiting factors.
C)   intrinsic limiting factors.
D)   density-dependent limiting factors.E) A) and C)
F) None of the above

Question 6

Available energy, in part, determines the

Accepted Answer

A)   carrying capacity.
B)   gene flow.
C)   reproductive potential.
D)   All of these answers are correct.E) C) and D)
F) A) and B)

Question 7

The human population will be in the stable equilibrium phase when the number of births ____ the number of deaths.

Accepted Answer

A)   is greater than
B)   equals
C)   is less than
D)   is halfE) B) and D)
F) A) and B) B

Question 8

Which one of the following would result in an increase in the rate at which a population grows?

Accepted Answer

A)   reduction in the birthrate
B)   reduction in the number of females
C)   reduction in the death rate
D)   reduction in the number of malesE) A) and B)
F) None of the above

Question 9

Interactions with other organisms affect the human population growth curve

Accepted Answer

A)   when organisms that cause human deaths become extinct.
B)   because other organisms are our food.
C)   when beneficial organisms protect crops from disease organisms.
D)   All of these answers are true.E) A) and C)
F) A) and B) D

Question 10

The number of individuals per unit area is the

Accepted Answer

A)   age distribution.
B)   biotic potential.
C)   distribution ratio.
D)   population density.E) All of the above
F) B) and C)

Question 11

The phase of a population growth curve that comes after the lag phase is the

Accepted Answer

A)   stable equilibrium phase.
B)   deceleration phase.
C)   exponential growth phase.
D)   death phase.E) A) and B)
F) All of the above

Question 12

A factor that directly affects the carrying capacity of a grasshopper population is

Accepted Answer

A)   the amount of sunlight.
B)   the number of insect-eating birds present.
C)   the amount of nitrogen in the soil.
D)   None of these answers is correct.E) All of the above
F) B) and C)

Question 13

As the size of a population approaches the carrying capacity

Accepted Answer

A)   the number of births and deaths are about equal.
B)   the population is in the lag phase.
C)   density-dependent limiting factors are not important.
D)   the biomass decreases.E) B) and D)
F) A) and D)

Question 14

The carrying capacity of an area can be reduced if there is too much

Accepted Answer

A)   energy.
B)   raw material.
C)   waste.
D)   All of these answers are true.E) A) and B)
F) A) and C)

Question 15

If something in the environment controls a population level and is uninfluenced by the population size, it is known as

Accepted Answer

A)   a biotic factor.
B)   a density-dependent limiting factor.
C)   a density-independent limiting factor.
D)   None of these answers is true.E) A) and D)
F) All of the above

Question 16

The number of offspring that could be born is the

Accepted Answer

A)   sex ratio.
B)   exponential growth phase.
C)   population.
D)   reproductive capacity.E) All of the above
F) B) and C)

Question 17

The number of new individuals added to the population by reproduction is called

Accepted Answer

A)   morbidity.
B)   mortality.
C)   natality.
D)   exponential growth.E) None of the above
F) B) and C) C

Question 18

The sum of all the different kinds of limiting factors is

Accepted Answer

A)   biological amplification.
B)   environmental resistance.
C)   biotic potential.
D)   symbiosis.E) C) and D)
F) A) and C)

Question 19

Gene flow is

Accepted Answer

A)   used for comparison purposes when numbers of organisms or size of organisms would lead to confusion.
B)   the optimum number of individuals of a species that can survive.
C)   movement of genes within a population from place to place resulting from migration.
D)   graphic expression of increasing or decreasing numbers.E) All of the above
F) B) and C)

Question 20

These small short-lived organisms have a reproductive strategy to produce many offspring that have fluctuating populations.

Accepted Answer

A)   r-strategists
B)   k-strategists
C)   l-strategists
D)   s-strategistsE) A) and D)
F) C) and D)

Exam 17: Population Ecology

If 100 bean seeds were planted in an area the size of your textbook and they all started to grow, you would expect

Correct AnswerverifiedShow Answer

If 100 bean seeds were planted in an area the size of your textbook and they all started to grow, you would expect

Correct AnswerverifiedShow Answer

The population will be largest during the

Correct AnswerverifiedShow Answer

A population is not changing in size during the ____ phase.

Correct AnswerverifiedShow Answer

Population control factors that arise from outside the population are called

Correct AnswerverifiedShow Answer

Available energy, in part, determines the

Correct AnswerverifiedShow Answer

The human population will be in the stable equilibrium phase when the number of births ____ the number of deaths.

Correct AnswerverifiedB

Which one of the following would result in an increase in the rate at which a population grows?

Correct AnswerverifiedShow Answer

Interactions with other organisms affect the human population growth curve

Correct AnswerverifiedD

The number of individuals per unit area is the

Correct AnswerverifiedShow Answer

The phase of a population growth curve that comes after the lag phase is the

Correct AnswerverifiedShow Answer

A factor that directly affects the carrying capacity of a grasshopper population is

Correct AnswerverifiedShow Answer

As the size of a population approaches the carrying capacity

Correct AnswerverifiedShow Answer

The carrying capacity of an area can be reduced if there is too much

Correct AnswerverifiedShow Answer

If something in the environment controls a population level and is uninfluenced by the population size, it is known as

Correct AnswerverifiedShow Answer

The number of offspring that could be born is the

Correct AnswerverifiedShow Answer

The number of new individuals added to the population by reproduction is called

Correct AnswerverifiedC

The sum of all the different kinds of limiting factors is

Correct AnswerverifiedShow Answer

Gene flow is

Correct AnswerverifiedShow Answer

These small short-lived organisms have a reproductive strategy to produce many offspring that have fluctuating populations.

Correct AnswerverifiedShow Answer

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B

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D

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C

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