Question 1

When experimental plants (e.g.,Atriplex prostrata)were grown at high densities,

Accepted Answer

A) individual growth rates increased. 
B) the proportion of resources allocated to leaf production increased. 
C) individual plant weight increased. 
D) net photosynthetic rate increased. 
A) individual growth rates increased. 
B) the proportion of resources allocated to leaf production increased. 
C) individual plant weight increased. 
D) net photosynthetic rate increased. B

Question 2

Dispersal is not a population regulatory mechanism.

Accepted Answer

A) True 
 B)False  True

Question 3

The presence of a uniform distribution among plants is often used as an indication that ________ is occurring.

Accepted Answer

competition

Question 4

Root competition among neighboring plants was studied by growing plants with their roots inside tubes of PVC pipes.Some tubes had holes of varying sizes,allowing their neighbors' roots to enter the tubes of a target plant.As the percentage of a target plant's tube open to neighbors' roots increased,

Accepted Answer

A) both target plant biomass and neighbor plant root biomass decreased. 
B) target plant biomass decreased and neighbor plant root biomass increased. 
C) target plant biomass increased and neighbor plant root biomass decreased. 
D) both target plant biomass and neighbor plant root biomass increased. 
A) both target plant biomass and neighbor plant root biomass decreased. 
B) target plant biomass decreased and neighbor plant root biomass increased. 
C) target plant biomass increased and neighbor plant root biomass decreased. 
D) both target plant biomass and neighbor plant root biomass increased.

Question 5

The maximum sustainable population size for the prevailing environment is called the ________ capacity.

Accepted Answer

The answer of The maximum sustainable population size for the...

Question 6

________ competition occurs when some competing individuals obtain enough resources for themselves while denying resources to others.

Accepted Answer

The answer of ________ competition occurs when some competing individuals...

Question 7

Self-thinning

Accepted Answer

A) is found only in populations of mobile organisms. 
B) occurs at high population densities. 
C) functions to increase the survival rate of all individuals in the population. 
D) is a type of scramble competition. 
A) is found only in populations of mobile organisms. 
B) occurs at high population densities. 
C) functions to increase the survival rate of all individuals in the population. 
D) is a type of scramble competition.

Question 8

As population size (N)increases,the per capita

Accepted Answer

A) birthrate and death rate increase. 
B) birthrate increases and death rate decreases. 
C) birthrate decreases and death rate increases. 
D) birthrate and death rate decrease. 
A) birthrate and death rate increase. 
B) birthrate increases and death rate decreases. 
C) birthrate decreases and death rate increases. 
D) birthrate and death rate decrease.

Question 9

Which of the following factors is most likely to be a density-independent regulator of population growth?

Accepted Answer

A) drought 
B) disease 
C) starvation 
D) parasites 
A) drought 
B) disease 
C) starvation 
D) parasites

Question 10

Plants can capture and defend space.

Accepted Answer

A) True 
 B)False

Question 11

In a wolf pack,the beta male

Accepted Answer

A) mates with all the females of the pack. 
B) is subordinate to the alpha female. 
C) is dominant over all members of the pack. 
D) is usually closely related to the alpha male. 
A) mates with all the females of the pack. 
B) is subordinate to the alpha female. 
C) is dominant over all members of the pack. 
D) is usually closely related to the alpha male.

Question 12

Which statement about stress is incorrect?

Accepted Answer

A) Stress increases as population density increases. 
B) Stress may trigger the release of specific chemical signals or pheromones. 
C) Stress can stimulate growth and increase the rate of reproduction. 
D) Stress may result in increased vulnerability to disease. 
A) Stress increases as population density increases. 
B) Stress may trigger the release of specific chemical signals or pheromones. 
C) Stress can stimulate growth and increase the rate of reproduction. 
D) Stress may result in increased vulnerability to disease.

Question 13

When a given area is saturated with territories,excluded individuals who lack a territory soon die of starvation.

Accepted Answer

A) True 
 B)False

Question 14

Competition for resources is a density-independent factor affecting a population.

Accepted Answer

A) True 
 B)False

Question 15

Density-________ growth is the inverse relationship between population density and individual growth.

Accepted Answer

The answer of Density-________ growth is the inverse relationship between...

Question 16

Density-dependent population regulation occurs only at high population densities.

Accepted Answer

A) True 
 B)False

Question 17

The form of competition in which growth and reproduction are depressed equally across individuals in a population as the intensity of competition increases is called

Accepted Answer

A) scramble competition. 
B) contest competition. 
C) exploitation competition. 
D) interference competition. 
A) scramble competition. 
B) contest competition. 
C) exploitation competition. 
D) interference competition.

Question 18

In logistic growth,the level at which population growth ceases is referred to as the

Accepted Answer

A) threshold of security. 
B) Malthusian parameter. 
C) saturation point. 
D) carrying capacity. 
A) threshold of security. 
B) Malthusian parameter. 
C) saturation point. 
D) carrying capacity.

Question 19

Within a social group,the ________ individual is dominant over all other members.

Accepted Answer

The answer of Within a social group,the ________ individual is...

Question 20

The progressive decline in density and increase in biomass of remaining individuals in a population is known as ________-thinning.

Accepted Answer

The answer of The progressive decline in density and increase...

Exam 11: Intraspecific Population Regulation

When experimental plants (e.g.,Atriplex prostrata)were grown at high densities,

Dispersal is not a population regulatory mechanism.

The presence of a uniform distribution among plants is often used as an indication that ________ is occurring.

The maximum sustainable population size for the prevailing environment is called the ________ capacity.

________ competition occurs when some competing individuals obtain enough resources for themselves while denying resources to others.

Self-thinning

As population size (N)increases,the per capita

Which of the following factors is most likely to be a density-independent regulator of population growth?

Plants can capture and defend space.

In a wolf pack,the beta male

Which statement about stress is incorrect?

When a given area is saturated with territories,excluded individuals who lack a territory soon die of starvation.

Competition for resources is a density-independent factor affecting a population.

Density-________ growth is the inverse relationship between population density and individual growth.

Density-dependent population regulation occurs only at high population densities.

The form of competition in which growth and reproduction are depressed equally across individuals in a population as the intensity of competition increases is called

In logistic growth,the level at which population growth ceases is referred to as the

Within a social group,the ________ individual is dominant over all other members.

The progressive decline in density and increase in biomass of remaining individuals in a population is known as ________-thinning.

The Nature of Ecology

Climate

The Aquatic Environment

The Terrestrial Environment

Life History

Metapopulations

Species Interactions,population Dynamics,and Natural Selection

Interspecific Competition

Predation

Parasitism and Mutualism

Community Structure

Factors Influencing the Structure of Communities

Community Dynamics

Landscape Dynamics

Ecosystem Energetics

Decomposition and Nutrient Cycling

Biogeochemical Cycles

Terrestrial Ecosystems

Aquatic Ecosystems

Coastal and Wetland Ecosystems

Large-Scale Patterns of Biological Diversity

Population Growth, resource Use, and Sustainability

Habitat Loss, biodiversity, and Conservation

Global Climate Change

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