Question 1

Which of the following indicates a population in decline? A) R₀ = 6.01 B) R₀ = 0.601 C) R₀ = 0 D) R₀ = - 0.601 E) R₀ = - 6.01

Accepted Answer

B

Question 2

Korpimaki and Norrdahl's research on voles (prey)and kestrels and owls (predators)suggest that the predator's population dynamics are
A) a functional response.
B) a numerical response.
C) in response to vole densities.
D) both a functional response and a numerical response.
E) both a numerical response and in response to vole densities.

Accepted Answer

Korpimaki and Norrdahl's research indicates that the population dynamics of predators (kestrels and owls) are both a numerical response and in response to vole densities. This means that the number of predators and their distribution are influenced by the density of their prey (voles), showing both a change in predator numbers and a spatial or distributional response to prey availability.

Question 3

Type III survivorship curve indicates
A) low juvenile mortality and high mortality in older adults.
B) high juvenile mortality and low mortality in older adults.
C) low juvenile mortality and low mortality in older adults.
D) high juvenile mortality and high mortality in older adults.
E) equal chance of dying at any age.

Accepted Answer

Type III survivorship curve indicates high juvenile mortality and low mortality in older adults, meaning that individuals have a low chance of surviving through their early life stages but have a higher chance of survival as they age.

Question 4

The 'net reproduction rate' equals A) ($\Sigma$x l_xm_x)/R₀. B) $\Sigma$ $\lambda$ n_x. C) $\Sigma$ l_x m_x. D) $\Sigma$ x l_x m_x. E) None of the choices are correct.

Accepted Answer

The answer of The 'net reproduction rate' equals A) ($\Sigma$x l_xm_x)/R₀. B)...

Question 5

Organisms that produce many offspring would best be characterized by which of the following?
A) a convex survivorship curve
B) a concave survivorship curve
C) a linear survivorship curve
D) a sigmoidal survivorship curve
E) None of the choices are correct.

Accepted Answer

The answer of Organisms that produce many offspring would best...

Question 6

The age distribution of a population can reveal
A) growth potential.
B) survivorship.
C) reproduction.
D) both growth potential and survivorship.
E) growth potential, survivorship, and reproduction.

Accepted Answer

The age distribution of a population can reveal growth potential, as younger populations tend to have higher growth rates. It can also indicate survivorship, showing how many individuals survive to older ages. Additionally, it can provide insights into reproduction patterns, such as at what age ranges the population is reproducing. Therefore, all three aspects—growth potential, survivorship, and reproduction—can be inferred from the age distribution of a population.

Question 7

Humans would best be represented by which of the following survivorships curves?
A) III
B) II
C) I
D) IV
E) None of the choices are correct.

Accepted Answer

Humans exhibit a Type I survivorship curve, which is characterized by a high survival rate throughout the majority of the lifespan, with most individuals dying in old age. This is due to factors such as modern medicine, which allows individuals to live longer and reduces infant and child mortality rates.

Question 8

Roland,Keyghobadi,and Fownes found in smaller meadow habitat,the Rocky Mountain Parnassian butterfly
A) has a larger wing span and more likely to disperse out of the patch.
B) populations are stable.
C) populations are smaller and individuals are more likely to disperse out of the patch.
D) population size is more variable.
E) None of the choices are correct.

Accepted Answer

The text states that in smaller meadow habitat, the populations of the Rocky Mountain Parnassian butterfly are smaller and individuals are more likely to disperse out of the patch.

Question 9

When using a significance level of 0.05,how often will you reject hypotheses that are actually correct?
A) 5% of the time or less
B) 5% of the time or more
C) 50% of the time or less
D) 50% of the time or more
E) 95% of the time or more

Accepted Answer

With a significance level of 0.05, you are willing to accept a 5% chance of mistakenly rejecting a true null hypothesis. Therefore, the answer is A) 5% of the time or less.

Question 10

Which of the following equations best represents the per capita rate of increase? A) r = T/(ln R₀) B) r = (ln R₀)/T C) $\lambda$ = Nt/( N_t+1) D) $\lambda$ = (N_t+1)/Nt E) None of the choices are correct.

Accepted Answer

The per capita rate of increase (r) is equal to the natural logarithm of the ratio of the final population size (Nt) to the initial population size (N0), divided by the time period (T). This can be expressed as r = (ln Nt/N0)/T. Option B is the only equation that represents this formula, with the terms R₀ representing Nt/N0.

Question 11

Which of the following cannot be determined using a fecundity schedule combined with a life table?
A) per capita rate of increase
B) net reproductive rate
C) mean generation time
D) dispersal rates
E) geometric rate of increase

Accepted Answer

Dispersal rates cannot be determined using a fecundity schedule combined with a life table, as they are not directly related to either fecundity or survival. Dispersal rates are a measure of the movement of individuals from one population to another, which is influenced by factors such as habitat quality, resource availability, and social interactions. Fecundity schedules and life tables provide information on the reproductive and survival rates of a population, which can be used to estimate other demographic parameters such as population growth rate, generation time, and reproductive output.

Question 12

Type I survivorship curve indicates
A) low juvenile mortality and high mortality in older adults.
B) high juvenile mortality and low mortality in older adults.
C) low juvenile mortality and low mortality in older adults.
D) high juvenile mortality and high mortality in older adults.
E) equal chance of dying at any age.

Accepted Answer

Type I survivorship curve is characterized by low juvenile mortality and high mortality in older adults, meaning that individuals have a higher chance of surviving to old age and then experiencing a higher rate of mortality. Examples of species exhibiting this type of survivorship curve include humans and elephants.

Question 13

Studies by Korpimäki and Norrdahl in western Finland showed that kestrel and owl densities closely follow variation in vole densities with little delay or lag time.They attributed this rapid numerical response to the
A) rapid rates of reproduction in the kestrel and owl populations.
B) nomadic nature of the kestrel and owl populations.
C) sedentary nature of mature individuals in the kestrel and owl populations.
D) lack of adequate predator defenses in the vole populations.
E) rapid rates of reproduction in the vole populations.

Accepted Answer

The answer of Studies by Korpimäki and Norrdahl in western...

Question 14

Which of the following equations best represents the geometric rate of increase? A) r = T/(ln R₀) B) r = (ln R₀)/T C) $\lambda$ = Nt/( N_t+1) D) $\lambda$ = (N_t+1)/Nt E) None of the choices are correct.

Accepted Answer

The answer of Which of the following equations best represents...

Question 15

Type II survivorship curve indicates
A) low juvenile mortality and high mortality in older adults.
B) high juvenile mortality and low mortality in older adults.
C) low juvenile mortality and low mortality in older adults.
D) high juvenile mortality and high mortality in older adults.
E) equal chance of dying at any age.

Accepted Answer

The answer of Type II survivorship curve indicates
A) low juvenile...

Question 16

The Africanized honeybee stopped spreading southward through South America by about 1983 in response to
A) unfavorable climatic factors.
B) aggressive pest control measures.
C) introduction of a species-specific parasite as a means of biological control.
D) severe competition with the closely related European honeybee.
E) None of the choices are correct.

Accepted Answer

Unfavorable climatic factors limited the southward spread of the Africanized honeybee through South America by about 1983.

Question 17

The 'mean generation time' of a population equals A) ($\Sigma$x l_xm_x)/R₀. B) $\Sigma$ $\lambda$n_x. C) $\Sigma$ l_x m_x. D) $\Sigma$ x l_x m_x. E) None of the choices are correct.

Accepted Answer

The answer of The 'mean generation time' of a population...

Question 18

A group of subpopulations living in spatially isolated patches connected by exchange of individuals among patches is called a(n)
A) micropopulation.
B) megapopulation.
C) isopopulation.
D) allopopulation.
E) metapopulation.
Learning Outcome: 10.02.01 Describe the role of dispersal in sustaining a metapopulation.

Accepted Answer

A group of subpopulations living in spatially isolated patches connected by exchange of individuals among patches is called a metapopulation. Dispersal is critical to the maintenance of a metapopulation, as it allows for the recolonization of patches that have experienced local extinction.

Question 19

Which of the following are mismatched? A) n_x : mortality rate B) l_x : survivorship history C) R₀ : net reproductive rate D) m_x : average number offspring per individual E) x : age/time interval

Accepted Answer

The answer of Which of the following are mismatched? A) n_x...

Question 20

Which of the following statements regarding 'mean generation time' is false?
A) It is generally calculated only for the females in a population.
B) It is the average time from offspring to offspring.
C) It can be calculated using a fecundity schedule and life table.
D) It can be used to calculate the geometric growth rate.
E) It can be used to calculate the per capita rate of increase.

Accepted Answer

The answer of Which of the following statements regarding 'mean...

Quiz 10: Population Dynamics

Which of the following indicates a population in decline?

Korpimaki and Norrdahl's research on voles (prey) and kestrels and owls (predators) suggest that the predator's population dynamics are

Type III survivorship curve indicates

The 'net reproduction rate' equals

Organisms that produce many offspring would best be characterized by which of the following?

The age distribution of a population can reveal

Humans would best be represented by which of the following survivorships curves?

Roland,Keyghobadi,and Fownes found in smaller meadow habitat,the Rocky Mountain Parnassian butterfly

When using a significance level of 0.05,how often will you reject hypotheses that are actually correct?

Which of the following equations best represents the per capita rate of increase?

Which of the following cannot be determined using a fecundity schedule combined with a life table?

Type I survivorship curve indicates

Studies by Korpimäki and Norrdahl in western Finland showed that kestrel and owl densities closely follow variation in vole densities with little delay or lag time.They attributed this rapid numerical response to the

Which of the following equations best represents the geometric rate of increase?

Type II survivorship curve indicates

The Africanized honeybee stopped spreading southward through South America by about 1983 in response to

The 'mean generation time' of a population equals

A group of subpopulations living in spatially isolated patches connected by exchange of individuals among patches is called a(n)

Which of the following are mismatched?

Which of the following statements regarding 'mean generation time' is false?