Question 1

Consider that a species of salmon lays 20,000 eggs per pair when it spawns and dies.At the end of five years,an average of one pair of mature salmon from this group of hatched eggs returns again to spawn in the parent stream (19,998 have not survived) .What is the growth rate of this population?

Accepted Answer

A)  10,000 - because there were that many eggs produced per parent fish (r) 
B)  2,000 - because this must be divided by five years
C)  None - because there is exact replacement of the previous generation
D)  2,000 - because there was this much average die-off per year
E)  20,000 - because there were that many eggs produced per parent fish (r2) F) All of the above
G) C) and E)

Question 2

In the near future,the human population is predicted to involve

Accepted Answer

A)  a worldwide decrease in population growth due to limited resources.
B)  an increase in population growth in all countries in the world.
C)  a decrease in growth in most,but not all,more-developed countries and continued growth in most less-developed countries.
D)  a continuation of human population growth at the same pace as in the previous century.E) A) and B)
F) B) and C)

Question 3

Consider the life of the praying mantis.The large,predatory female lays several hundred eggs in a foam mass in the fall.The young are most vulnerable when they emerge in the spring,but the few that survive spread out over the countryside and,if they find a mate,lay eggs the following fall.Which type of survivorship curve does this represent?

Accepted Answer

A)  type I
B)  type II
C)  type III
D)  exponential growth followed by a decline from resource depletion
E)  maximal exponential growth and minimal use of carrying capacityF) A) and C)
G) B) and C)

Question 4

As the carrying capacity of an environment is approached by a population,

Accepted Answer

A)  births begin to exceed deaths.
B)  deaths begin to exceed births.
C)  the rate of reproduction increases.
D)  population growth begins to be exponential.
E)  density-dependent environmental resistance increases.F) B) and D)
G) B) and E)

Question 5

Intrinsic factors,such as behavior and physiology,may affect growth rates of a population.

Accepted Answer

A) True 
 B)False

Question 6

The maximum rate of natural increase of a population that occurs under ideal conditions is the

Accepted Answer

A)  population growth.
B)  biotic potential.
C)  environmental resistance.
D)  carrying capacity.
E)  density-independent population.F) A) and B)
G) B) and C)

Question 7

Which variable is not a density-dependent factor?

Accepted Answer

A)  competition between two male deer for territory
B)  a red-tailed hawk preying upon a population of field mice
C)  smallpox outbreaks during the 1800s
D)  an early cold spell that causes the plants in a given area to die off earlier than normalE) B) and D)
F) A) and D)

Question 8

Dandelions and tent caterpillars,which are r-strategists,are examples of opportunistic species that tend to move in high numbers and rapidly occupy new environments.

Accepted Answer

A) True 
 B)False

Question 9

A pond represents a(n) ________,while the minnows represent a(n) ________.

Accepted Answer

A)  population; community
B)  population; ecosystem
C)  ecosystem; population
D)  community; population
E)  ecosystem; communityF) C) and E)
G) All of the above

Exam 44: Population Ecology

Dandelions and tent caterpillars,which are r-strategists,are examples of opportunistic species that tend to move in high numbers and rapidly occupy new environments.

Correct Answer
verified

Correct Answer
verified

Consider that a species of salmon lays 20,000 eggs per pair when it spawns and dies.At the end of five years,an average of one pair of mature salmon from this group of hatched eggs returns again to spawn in the parent stream (19,998 have not survived) .What is the growth rate of this population?

Correct Answer
verified

Which variable is not a density-dependent factor?

Correct Answer
verified

A pond represents a(n) ,while the minnows represent a(n) .

Correct Answer
verified

Intrinsic factors,such as behavior and physiology,may affect growth rates of a population.

Correct Answer
verified

As the carrying capacity of an environment is approached by a population,

Correct Answer
verified

The maximum rate of natural increase of a population that occurs under ideal conditions is the

Correct Answer
verified

In the near future,the human population is predicted to involve

Correct Answer
verified

Exam 44: Population Ecology

Dandelions and tent caterpillars,which are r-strategists,are examples of opportunistic species that tend to move in high numbers and rapidly occupy new environments.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Consider that a species of salmon lays 20,000 eggs per pair when it spawns and dies.At the end of five years,an average of one pair of mature salmon from this group of hatched eggs returns again to spawn in the parent stream (19,998 have not survived) .What is the growth rate of this population?

Correct AnswerverifiedShow Answer

Which variable is not a density-dependent factor?

Correct AnswerverifiedShow Answer

A pond represents a(n) ________,while the minnows represent a(n) ________.

Correct AnswerverifiedShow Answer

Intrinsic factors,such as behavior and physiology,may affect growth rates of a population.

Correct AnswerverifiedShow Answer

As the carrying capacity of an environment is approached by a population,

Correct AnswerverifiedShow Answer

The maximum rate of natural increase of a population that occurs under ideal conditions is the

Correct AnswerverifiedShow Answer

In the near future,the human population is predicted to involve

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

A pond represents a(n) ,while the minnows represent a(n) .

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified