Question 1

The rate at which a population of a given species will increase when no limits are placed on its rate of growth is called its __________.

Accepted Answer

A) maximum growth 
B) carrying capacity 
C) biotic potential 
D) optimal growth 
A) maximum growth 
B) carrying capacity 
C) biotic potential 
D) optimal growth C

Question 2

Population pyramids are primarily used to show

Accepted Answer

A) death rates. 
B) birth rates. 
C) competition. 
D) sex and age composition of a population. 
E) the carrying capacity. 
A) death rates. 
B) birth rates. 
C) competition. 
D) sex and age composition of a population. 
E) the carrying capacity. D

Question 3

The r-selected populations are characterized by all of the following except

Accepted Answer

A) early age of first reproduction. 
B) large brood size/numerous offspring. 
C) little or no parental care. 
D) short generation time. 
E) Type I survivorship curves. 
A) early age of first reproduction. 
B) large brood size/numerous offspring. 
C) little or no parental care. 
D) short generation time. 
E) Type I survivorship curves. E

Question 4

Spacing within a population for a species that is strongly territorial would be expected to be

Accepted Answer

A) uniform. 
B) clumped. 
C) random. 
D) uniform or clumped depending if it is a source or sink metapopulation. 
E) uniform or clumped depending on the life history strategy of the species. 
A) uniform. 
B) clumped. 
C) random. 
D) uniform or clumped depending if it is a source or sink metapopulation. 
E) uniform or clumped depending on the life history strategy of the species.

Question 5

Effects that are dependent on the size of the population and regulate the growth of populations are called ___________ effects.

Accepted Answer

A) K-related 
B) density-independent 
C) environmental resistance 
D) density-dependent 
E) demographic 
A) K-related 
B) density-independent 
C) environmental resistance 
D) density-dependent 
E) demographic

Question 6

What point on the graph (marked by A,B,C,D,or E)shows the result of a density independent change in the size of the population?

Accepted Answer

A) A 
B) B 
C) C 
D) D 
E) E 
A) A 
B) B 
C) C 
D) D 
E) E

Question 7

In the sigmoid growth curve,the carrying capacity of the environment is

Accepted Answer

A) r. 
B) N. 
C) K. 
D) dN/dt. 
E) N/K. 
A) r. 
B) N. 
C) K. 
D) dN/dt. 
E) N/K.

Question 8

Which of the following statements is true about the graph?

Accepted Answer

A) Oysters live longer than HydrA. 
B) Hydra and humans have parallel life spans. 
C) Humans and oysters have similar life spans. 
D) Humans have low mortality rates late in life. 
E) Oysters have high mortality rates late in lifE. 
A) Oysters live longer than HydrA. 
B) Hydra and humans have parallel life spans. 
C) Humans and oysters have similar life spans. 
D) Humans have low mortality rates late in life. 
E) Oysters have high mortality rates late in lifE.

Question 9

Clumped or patched populations that undergo local periodic extinction and recolonization are called

Accepted Answer

A) randomly spaced populations. 
B) uniformly spaced populations. 
C) metapopulations. 
D) over sized populations. 
E) endangered populations. 
A) randomly spaced populations. 
B) uniformly spaced populations. 
C) metapopulations. 
D) over sized populations. 
E) endangered populations.

Question 10

The change that begins at point C could be caused by

Accepted Answer

A) increased predation by wolves. 
B) a wet year with increased vegetative growth. 
C) increased competition from moose herds. 
D) a dry year with decreased vegetative growth. 
E) lower than normal birth rates. 
A) increased predation by wolves. 
B) a wet year with increased vegetative growth. 
C) increased competition from moose herds. 
D) a dry year with decreased vegetative growth. 
E) lower than normal birth rates.

Question 11

In the logistic growth model,as the number of individuals in the population (N)approaches the carrying capacity (K),the intrinsic rate of growth (r)

Accepted Answer

A) will be affected by an increased birth rate. 
B) will be affected by a decreased death rate from predation. 
C) will be affected by increased competition with other species. 
D) will be affected by increased competition within the species. 
E) will not changE. 
A) will be affected by an increased birth rate. 
B) will be affected by a decreased death rate from predation. 
C) will be affected by increased competition with other species. 
D) will be affected by increased competition within the species. 
E) will not changE.

Question 12

In the logistic growth model,as the number of individuals in the population (N)approaches the carrying capacity (K),the rate of growth (dN/dt)

Accepted Answer

A) increases rapidly until N far surpasses K. 
B) increases rapidly until N reaches K and then stops. 
C) increases at the same rate it has been,continuing on until N is beyond K for some distance before regulating. 
D) approaches zero as N approaches K. 
E) stops well before N reaches K and stabilizes. 
A) increases rapidly until N far surpasses K. 
B) increases rapidly until N reaches K and then stops. 
C) increases at the same rate it has been,continuing on until N is beyond K for some distance before regulating. 
D) approaches zero as N approaches K. 
E) stops well before N reaches K and stabilizes.

Question 13

Organisms that produce offspring several times over many seasons exhibit a life history adaptation called

Accepted Answer

A) semelparity. 
B) iteroparity. 
C) biparity. 
D) polyparity. 
E) alloparity. 
A) semelparity. 
B) iteroparity. 
C) biparity. 
D) polyparity. 
E) alloparity.

Question 14

Parental care of the young is usually associated with species with a Type ___ survivorship curve.

Accepted Answer

A) I 
B) II 
C) III 
D) I or II (depending on the sex ratio) 
E) I or III (depending on whether the reproductive strategy if iteroparous or semelparous) 
A) I 
B) II 
C) III 
D) I or II (depending on the sex ratio) 
E) I or III (depending on whether the reproductive strategy if iteroparous or semelparous)

Question 15

Population studies include all of the following features except

Accepted Answer

A) size. 
B) biodiversity. 
C) density. 
D) dispersion. 
E) demography. 
A) size. 
B) biodiversity. 
C) density. 
D) dispersion. 
E) demography.

Question 16

What is the most reasonable conclusion that can be made from data graphed in the figure.

Accepted Answer

A) After high mortality early in life,survivorship becomes constant for the rest of life. 
B) After high mortality late in life,survivorship becomes constant for the rest of life. 
C) After high mortality early in life,survivorship increases at a constant rate for the rest of life. 
D) After high mortality late in life,survivorship increases at a constant rate for the rest of life. 
E) After high mortality early in life,survivorship decreases at a constant rate for the rest of lifE. 
A) After high mortality early in life,survivorship becomes constant for the rest of life. 
B) After high mortality late in life,survivorship becomes constant for the rest of life. 
C) After high mortality early in life,survivorship increases at a constant rate for the rest of life. 
D) After high mortality late in life,survivorship increases at a constant rate for the rest of life. 
E) After high mortality early in life,survivorship decreases at a constant rate for the rest of lifE.

Question 17

During the late 1800s,cattle egrets arrived in South America from Africa and began to colonize.Their range has expanded dramatically over the years.They were able to do this because

Accepted Answer

A) the habitats that they left in Africa were not suitable for any further colonization;thus,they were forced to immigrate. 
B) the habitats that they encountered in South America were suitable to them and unoccupied. 
C) there were abundant cattle for the birds to gather around in South America;furthermore,various animals that the egrets had lived around in Africa had become quite scarce because of over hunting and poaching,causing the birds to extend their range. 
D) the food resources in South America were far superior to those in Africa,allowing the egrets more opportunity to grow and reproduce and ultimately expand their range. 
A) the habitats that they left in Africa were not suitable for any further colonization;thus,they were forced to immigrate. 
B) the habitats that they encountered in South America were suitable to them and unoccupied. 
C) there were abundant cattle for the birds to gather around in South America;furthermore,various animals that the egrets had lived around in Africa had become quite scarce because of over hunting and poaching,causing the birds to extend their range. 
D) the food resources in South America were far superior to those in Africa,allowing the egrets more opportunity to grow and reproduce and ultimately expand their range.

Question 18

A small group of mice are released on an island without mice but with abundant food for mice and no predators.After the population size stabilizes for several years,a hurricane drastically reduces it,we can now say that

Accepted Answer

A) the biotic potential of the population has been reduced. 
B) its new population size is a result of density-dependent regulation. 
C) its new population size is a result of density-independent regulation. 
D) it can now act as a sink metapopulation. 
E) it can now act as a source metapopulation. 
A) the biotic potential of the population has been reduced. 
B) its new population size is a result of density-dependent regulation. 
C) its new population size is a result of density-independent regulation. 
D) it can now act as a sink metapopulation. 
E) it can now act as a source metapopulation.

Question 19

Which of the following factors is not one that increases the likelihood of population extinction?

Accepted Answer

A) Small population size is a factor contributing to a population's extinction. 
B) Isolation of a population from sources of immigrants is a factor contributing to a population's extinction. 
C) Isolation of a population from sinks of immigrants is a factor contributing to a population's extinction. 
D) Low resource availability is a factor contributing to a population's extinction. 
E) Lack of genetic diversity is a factor contributing to a population's extinction. 
A) Small population size is a factor contributing to a population's extinction. 
B) Isolation of a population from sources of immigrants is a factor contributing to a population's extinction. 
C) Isolation of a population from sinks of immigrants is a factor contributing to a population's extinction. 
D) Low resource availability is a factor contributing to a population's extinction. 
E) Lack of genetic diversity is a factor contributing to a population's extinction.

Question 20

The biotic potential representing growth without limits at its maximal rate is given the symbol

Accepted Answer

A) r. 
B) N. 
C) K. 
D) dN/dt. 
E) N/K. 
A) r. 
B) N. 
C) K. 
D) dN/dt. 
E) N/K.

Exam 56: Population Ecology

The rate at which a population of a given species will increase when no limits are placed on its rate of growth is called its __________.

Population pyramids are primarily used to show

The r-selected populations are characterized by all of the following except

Spacing within a population for a species that is strongly territorial would be expected to be

Effects that are dependent on the size of the population and regulate the growth of populations are called ___________ effects.

What point on the graph (marked by A,B,C,D,or E)shows the result of a density independent change in the size of the population?

In the sigmoid growth curve,the carrying capacity of the environment is

Which of the following statements is true about the graph?

Clumped or patched populations that undergo local periodic extinction and recolonization are called

The change that begins at point C could be caused by

In the logistic growth model,as the number of individuals in the population (N)approaches the carrying capacity (K),the intrinsic rate of growth (r)

In the logistic growth model,as the number of individuals in the population (N)approaches the carrying capacity (K),the rate of growth (dN/dt)

Organisms that produce offspring several times over many seasons exhibit a life history adaptation called

Parental care of the young is usually associated with species with a Type ___ survivorship curve.

Population studies include all of the following features except

What is the most reasonable conclusion that can be made from data graphed in the figure.

During the late 1800s,cattle egrets arrived in South America from Africa and began to colonize.Their range has expanded dramatically over the years.They were able to do this because

A small group of mice are released on an island without mice but with abundant food for mice and no predators.After the population size stabilizes for several years,a hurricane drastically reduces it,we can now say that

Which of the following factors is not one that increases the likelihood of population extinction?

The biotic potential representing growth without limits at its maximal rate is given the symbol

The Science of Biology

The Nature of Molecules

The Chemical Building Blocks of Life

Cell Structure

Membranes

Energy and Metabolism

How Cells Harvest Energy

Photosynthesis

Cell Communication

How Cells Divide

Sexual Reproduction and Meiosis

Patterns of Inheritance

Chromosomes Mapping and the Meiosis - Inheritance Connection

Dna: the Genetic Material

Genes and How They Work

Control of Gene Expression

Biotechnology

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Cellular Mechanisms of Development

Genes Within Populations

The Evidence for Evolution

The Origin of Species

Systematics and the Phylogenetic Revolution

Genome Evolution

Evolution of Development

The Tree of Life

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Overview of Green Plants

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