Question 1

The figure shows the change in population size of Paramecium from Gause's experiment, raised in either high-food or low-food conditions. Based on this figure, how was the logistic growth model for Paramecium changed by adding food?

Accepted Answer

A)   High food increased r.
B)   High food decreased r.
C)   High food increased K.
D)   High food decreased K.

Question 2

What is true about the life table data and resulting survivorship curve for Dall sheep as published by O. Murie in 1944?

Accepted Answer

A)   The survivorship curve showed a definitive type II curve.
B)   Age class 0-1 had higher survivorship then any of the next three ages classes.
C)   When the population size for a particular age class was small, survivorship rates were unreliable.
D)   The real-world survivorship curve based on the collection of 608 Dall sheep skeletons did not differ from the expected, generalized curve for similar species.

Question 3

Which factors could limit a species' carrying capacity?
I. the amount of food available
II. the number of eggs a female can produce
III. the number of nesting sites present

Accepted Answer

A)   I only
B)   II only
C)   III only
D)   I and II
E)   I and III

Question 4

Describe the similarities and differences between a cohort life table and a static life table. Give an actual example of each.

Accepted Answer

A cohort life table and a static life ta...

Question 5

In a population growing according to the exponential growth model, population size is

Accepted Answer

A)   limited by density-dependent factors.
B)   limited by density-independent factors.
C)   limited by both density-dependent and density-independent factors.
D)   not limited.

Question 6

Applying life tables to sea turtle conservation demonstrated that the most effective way to increase sea turtle populations is to

Accepted Answer

A)   raise large numbers of hatchlings and release them into the ocean.
B)   protect nests from human poaching and other predators.
C)   protect adults from being captured in fishing nets.
D)   harvest small numbers of adults for human consumption each year.

Question 7

A park biologist is planting saplings (young trees) in an old field that has recently been turned into a park. Draw a hypothetical self-thinning curve for these trees over 5 years. Be sure to label the axes. Describe a practical use of this curve.

Accepted Answer

The hypothetical self-thinning curve for...

Question 8

Which reflects positive density-dependent population regulation?
I. Small populations of flowers produce fewer seeds per individual than large populations of flowers.
II. Large groups of birds are better able to detect and avoid predators than small groups of birds.
III. The probability that a forest predator will kill a squirrel does not depend on the size of the squirrel population.

Accepted Answer

A)   I only
B)   II only
C)   III only
D)   I and II
E)   I and III

Question 9

Which plot is consistent with a geometric growth model in which  λ\lambdaλ = 1?

Accepted Answer

A)   a
B)   b
C)   c
D)   d

Question 10

When looking at plants, what would be considered a plant's generation time?

Accepted Answer

A)   Plants do not have generation times; only animals have generation times.
B)   the time it takes for a seed to grow into a mature plant and produce seeds of its own
C)   the time it takes for a seed to germinate
D)   the time it takes for a seed to flower

Question 11

Which is the most accurate statement about the conservation biology of species with positive density-dependent population regulation?

Accepted Answer

A)   If the population is small, it may not be able to increase.
B)   The population will quickly exhaust all resources.
C)   Species with positive density dependence are not at risk for extinction.
D)   Population growth rate is highest when N > K.

Question 12

In the exponential growth model, which term indicates the intrinsic rate of increase?

Accepted Answer

A)   N0
B)   e
C)   r
D)   t

Question 13

That individuals are more likely to find mates and reproduce when populations are larger as compared to when populations are smaller might be termed

Accepted Answer

A)   the Allee effect.
B)   negative density dependence.
C)   a density-independent variable.
D)   self-thinning

Question 14

The Allee effect describes

Accepted Answer

A)   density-independent population regulation.
B)   negative density-dependent population regulation.
C)   positive density-dependent population regulation.
D)   logistic population growth.

Question 15

All cohort life tables

Accepted Answer

A)   follow individuals born at the same time from birth to death.
B)   quantify the survival and fecundity of all individuals at a single time interval.
C)   have a stable age distribution.
D)   describe a population at its carrying capacity.

Question 16

Describe how the geometric growth model is different from the exponential growth model. For each growth model, give an example of an organism that fits the growth pattern it describes. Explain why the organism fits the model.

Accepted Answer

The geometric growth model and the expon...

Question 17

When working with life tables, we work with many variables and make many calculations. One such variable of importance is bx or fecundity. An important calculation we make as we determine the net reproductive rate is lxbx. This calculation is often referred to as "realized fecundity." Why might that be the case?

Accepted Answer

A)   because we are looking at fecundity rate for females as well as considering how many females survive (survivorship rate)  to each reproductive age class
B)   because we are looking at both male and female survivorship at each age class
C)   because we are looking at survivorship only at prereproductive age classes
D)   because we are looking at survivorship only at postreproductive age classes

Question 18

Using the logistic growth model, draw a line that shows the relationship between per capita growth rate (y axis) and population size (x axis) for a hypothetical population with a carrying capacity of 500 individuals. Explain how the slope relates to changes in population size over time and give an example of an environmental factor that could cause a population to follow a logistic model of population growth.

Accepted Answer

The logistic growth model is represented...

Question 19

The intrinsic growth rate, r, is the

Accepted Answer

A)   number of new individuals produced minus the number that die.
B)   highest possible per capita increase in population size under ideal conditions.
C)   time it takes for a population to double in size.
D)   maximum population size that can be supported by the environment.

Question 20

Define population doubling time. Starting with the model for exponential population growth, explain how to derive the formula for population doubling time.

Accepted Answer

Population doubling time is the time it ...

Exam 12: Population Growth and Regulation

When looking at plants, what would be considered a plant's generation time?

Correct Answer
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Describe the similarities and differences between a cohort life table and a static life table. Give an actual example of each.

Correct Answer
Answered by ExamLex AI
A cohort life table and a static life ta...
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Describe how the geometric growth model is different from the exponential growth model. For each growth model, give an example of an organism that fits the growth pattern it describes. Explain why the organism fits the model.

Correct Answer
Answered by ExamLex AI
The geometric growth model and the expon...
View Answer

The figure shows the change in population size of Paramecium from Gause's experiment, raised in either high-food or low-food conditions. Based on this figure, how was the logistic growth model for Paramecium changed by adding food?

Correct Answer
verified

Applying life tables to sea turtle conservation demonstrated that the most effective way to increase sea turtle populations is to

Correct Answer
verified

The Allee effect describes

Correct Answer
verified

Which factors could limit a species' carrying capacity? I. the amount of food available II. the number of eggs a female can produce III. the number of nesting sites present

Correct Answer
verified

A park biologist is planting saplings (young trees) in an old field that has recently been turned into a park. Draw a hypothetical self-thinning curve for these trees over 5 years. Be sure to label the axes. Describe a practical use of this curve.

Correct Answer
Answered by ExamLex AI
The hypothetical self-thinning curve for...
View Answer

All cohort life tables

Correct Answer
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$Which plot is consistent with a geometric growth model in which \lambda = 1? A) a B) b C) c D) d$ Which plot is consistent with a geometric growth model in which $\lambda$ = 1?

Correct Answer
verified

That individuals are more likely to find mates and reproduce when populations are larger as compared to when populations are smaller might be termed

Correct Answer
verified

Correct Answer
verified

Which is the most accurate statement about the conservation biology of species with positive density-dependent population regulation?

Correct Answer
verified

Define population doubling time. Starting with the model for exponential population growth, explain how to derive the formula for population doubling time.

Correct Answer
Answered by ExamLex AI
Population doubling time is the time it ...
View Answer

Correct Answer
Answered by ExamLex AI
The logistic growth model is represented...
View Answer

In a population growing according to the exponential growth model, population size is

Correct Answer
verified

Correct Answer
verified

The intrinsic growth rate, r, is the

Correct Answer
verified

In the exponential growth model, which term indicates the intrinsic rate of increase?

Correct Answer
verified

What is true about the life table data and resulting survivorship curve for Dall sheep as published by O. Murie in 1944?

Correct Answer
verified

Exam 12: Population Growth and Regulation

When looking at plants, what would be considered a plant's generation time?

Correct AnswerverifiedShow Answer

Describe the similarities and differences between a cohort life table and a static life table. Give an actual example of each.

Correct AnswerAnswered by ExamLex AIA cohort life table and a static life ta...View AnswerShow Answer

Describe how the geometric growth model is different from the exponential growth model. For each growth model, give an example of an organism that fits the growth pattern it describes. Explain why the organism fits the model.

Correct AnswerAnswered by ExamLex AIThe geometric growth model and the expon...View AnswerShow Answer

The figure shows the change in population size of Paramecium from Gause's experiment, raised in either high-food or low-food conditions. Based on this figure, how was the logistic growth model for Paramecium changed by adding food?

Correct AnswerverifiedShow Answer

Applying life tables to sea turtle conservation demonstrated that the most effective way to increase sea turtle populations is to

Correct AnswerverifiedShow Answer

The Allee effect describes

Correct AnswerverifiedShow Answer

Which factors could limit a species' carrying capacity? I. the amount of food available II. the number of eggs a female can produce III. the number of nesting sites present

Correct AnswerverifiedShow Answer

A park biologist is planting saplings (young trees) in an old field that has recently been turned into a park. Draw a hypothetical self-thinning curve for these trees over 5 years. Be sure to label the axes. Describe a practical use of this curve.

Correct AnswerAnswered by ExamLex AIThe hypothetical self-thinning curve for...View AnswerShow Answer

All cohort life tables

Correct AnswerverifiedShow Answer

Which plot is consistent with a geometric growth model in which λ\lambdaλ = 1?

Correct AnswerverifiedShow Answer

That individuals are more likely to find mates and reproduce when populations are larger as compared to when populations are smaller might be termed

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which is the most accurate statement about the conservation biology of species with positive density-dependent population regulation?

Correct AnswerverifiedShow Answer

Define population doubling time. Starting with the model for exponential population growth, explain how to derive the formula for population doubling time.

Correct AnswerAnswered by ExamLex AIPopulation doubling time is the time it ...View AnswerShow Answer

Correct AnswerAnswered by ExamLex AIThe logistic growth model is represented...View AnswerShow Answer

In a population growing according to the exponential growth model, population size is

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The intrinsic growth rate, r, is the

Correct AnswerverifiedShow Answer

In the exponential growth model, which term indicates the intrinsic rate of increase?

Correct AnswerverifiedShow Answer

What is true about the life table data and resulting survivorship curve for Dall sheep as published by O. Murie in 1944?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
Answered by ExamLex AI
A cohort life table and a static life ta...
View Answer

Correct Answer
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The geometric growth model and the expon...
View Answer

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
verified

Correct Answer
Answered by ExamLex AI
The hypothetical self-thinning curve for...
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Correct Answer
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$Which plot is consistent with a geometric growth model in which \lambda = 1? A) a B) b C) c D) d$ Which plot is consistent with a geometric growth model in which $\lambda$ = 1?

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
Answered by ExamLex AI
Population doubling time is the time it ...
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The logistic growth model is represented...
View Answer

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Correct Answer
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Correct Answer
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