Question 1

Crowding ____. ​

Accepted Answer

A) has a positive effect on reproduction 
B) decreases the growth rate of individuals 
C) only occurs in plant species 
D) causes immigration 
E) stimulates developmental and behavioral changes 
A) has a positive effect on reproduction 
B) decreases the growth rate of individuals 
C) only occurs in plant species 
D) causes immigration 
E) stimulates developmental and behavioral changes B

Question 2

According to the text, humans have two options for limiting population growth: 1)make a global effort to limit our own population, or 2)can wait until the environment does it for us. Briefly address each scenario. Which methods would result in a successful global decline in birthrate? Which environmental events are the alternatives?

Accepted Answer

Government-sponsored family planning programs have had great success both in reducing birth rates, and in improving the health and status of women. Providing medical care in conjunction with such programs encourages families to have fewer children. In places with high child mortality rates, family sizes are high. Environmental events that will bring about an uncontrolled decline in population include war, famine, drought, and exposure to accumulating toxins.

Question 3

Match between columns
                        Premises: low mortality rate

Accepted Answer

The Answer of r -selected and K -selected is...

Question 4

An example of passive parental care is ____.

Accepted Answer

A) nutrients that cross the placenta 
B) nursing 
C) nurturing 
D) the nest environment 
E) protection from predators 
A) nutrients that cross the placenta 
B) nursing 
C) nurturing 
D) the nest environment 
E) protection from predators

Question 5

The intrinsic rate of increase is ____ for bacteria, protists, and animals with short generation times and ____ for those with long generation time.

Accepted Answer

A) high; low 
B) high; constant 
C) low; high 
D) low; constant 
E) constant; low 
A) high; low 
B) high; constant 
C) low; high 
D) low; constant 
E) constant; low

Question 6

Uniform dispersion usually results from individuals of a species repelling each other.

Accepted Answer

A) True 
 B)False

Question 7

Match between columns
                        Premises: the logistic model

Accepted Answer

The Answer of population growth slows as population approaches K is...

Question 8

Marine biologists tagged and released 50 marlin. Later, fishermen caught 300 marlin, 15 of which had tags. What is the estimate for the number of marlin in the population?

Accepted Answer

A) 5,000 
B) 315 
C) 365 
D) 2,500 
E) 1,000 
A) 5,000 
B) 315 
C) 365 
D) 2,500 
E) 1,000

Question 9

How are an organism's lifetime energy use and economics analogous?

Accepted Answer

Every organism is constrained by a finit

Question 10

Which phenotypic effects does crowding have on the migratory locust? How are these changes adaptive?

Accepted Answer

Migratory locusts can develop into eithe

Question 11

The logistic model assumes that ____ will become increasingly limited as population grows larger.

Accepted Answer

A) deaths 
B) births 
C) immigration 
D) competition 
E) vital resources 
A) deaths 
B) births 
C) immigration 
D) competition 
E) vital resources

Question 12

Males have little influence on population growth in populations with ____.

Accepted Answer

A) more males than females 
B) more females than males 
C) equal numbers of females and males 
D) one male 
E) animals that form lifelong pairs 
A) more males than females 
B) more females than males 
C) equal numbers of females and males 
D) one male 
E) animals that form lifelong pairs

Question 13

Which statement describes the general relationship between population density and body size?

Accepted Answer

A) Population density increases with increasing body size. 
B) Population density is equal to body size. 
C) Population density decreases with increasing body size. 
D) Population density is not related to body size. 
E) Population density first decreases then increases with increasing body size. 
A) Population density increases with increasing body size. 
B) Population density is equal to body size. 
C) Population density decreases with increasing body size. 
D) Population density is not related to body size. 
E) Population density first decreases then increases with increasing body size.

Question 14

A population's ____ occurs under ideal, unrealistic conditions. ​

Accepted Answer

A) per capita growth rate 
B) per capita population curve 
C) intrinsic rate of increase 
D) geometric population curve 
E) exponential population curve 
A) per capita growth rate 
B) per capita population curve 
C) intrinsic rate of increase 
D) geometric population curve 
E) exponential population curve

Question 15

Research has shown that commercial fisheries place selective pressure on fish populations by harvesting mostly the ____ fish, resulting in ____.

Accepted Answer

A) young; aging populations 
B) larger; maturity at smaller sizes 
C) smaller; maturity at larger sizes 
D) prereproductive; declining birth rates 
E) postreproductive; no change in population size 
A) young; aging populations 
B) larger; maturity at smaller sizes 
C) smaller; maturity at larger sizes 
D) prereproductive; declining birth rates 
E) postreproductive; no change in population size

Question 16

What is true of most deciduous trees in the temperate zone?

Accepted Answer

A) they spend all of their energy on reproduction 
B) growth and reproduction occur simultaneously 
C) they only produce one or two offspring annually 
D) they produce thousands of seeds for one or two years 
E) they only begin to breed after reaching adulthood 
A) they spend all of their energy on reproduction 
B) growth and reproduction occur simultaneously 
C) they only produce one or two offspring annually 
D) they produce thousands of seeds for one or two years 
E) they only begin to breed after reaching adulthood

Question 17

Populations in which environmental conditions don't vary much within a habitat tend to have ____ dispersion. ​

Accepted Answer

A) random 
B) clumped 
C) uniform 
D) dynamic 
E) unpredictable 
A) random 
B) clumped 
C) uniform 
D) dynamic 
E) unpredictable

Question 18

What are some density-dependent factors that affect humans at higher population densities? How have these been addressed in industrial societies?

Accepted Answer

Competition for all resources increases

Question 19

Which trait is characteristic of a K -selected species? ​

Accepted Answer

A) adapted to rapidly changing environments 
B) small body size 
C) short generation time 
D) provide substantial parental care to offspring 
E) single reproductive event 
A) adapted to rapidly changing environments 
B) small body size 
C) short generation time 
D) provide substantial parental care to offspring 
E) single reproductive event

Question 20

Which characteristics are consistent with a K -selected species? Where do humans fall on the r through K continuum?

Accepted Answer

K -selected species tend to have larger

Exam 52: Population Ecology

Crowding ____. ​

An example of passive parental care is ____.

The intrinsic rate of increase is ____ for bacteria, protists, and animals with short generation times and ____ for those with long generation time.

Uniform dispersion usually results from individuals of a species repelling each other.

Marine biologists tagged and released 50 marlin. Later, fishermen caught 300 marlin, 15 of which had tags. What is the estimate for the number of marlin in the population?

How are an organism's lifetime energy use and economics analogous?

Which phenotypic effects does crowding have on the migratory locust? How are these changes adaptive?

The logistic model assumes that ____ will become increasingly limited as population grows larger.

Males have little influence on population growth in populations with ____.

Which statement describes the general relationship between population density and body size?

A population's ____ occurs under ideal, unrealistic conditions. ​

Research has shown that commercial fisheries place selective pressure on fish populations by harvesting mostly the ____ fish, resulting in ____.

What is true of most deciduous trees in the temperate zone?

Populations in which environmental conditions don't vary much within a habitat tend to have ____ dispersion. ​

What are some density-dependent factors that affect humans at higher population densities? How have these been addressed in industrial societies?

Which trait is characteristic of a K -selected species? ​

Which characteristics are consistent with a K -selected species? Where do humans fall on the r through K continuum?

Introduction to Biological Concepts and Research

Life, Chemistry, and Water

Biological Molecules: the Carbon Compounds of Life

Cells

Membranes and Transport

Energy, Enzymes, and Biological Reactions

Cellular Respiration: Harvesting Chemical Energy

Photosynthesis

Cell Communication

Cell Division and Mitosis

Meiosis: the Cellular Basis of Sexual Reproduction

Mendel, Genes, and Inheritance

Genes, Chromosomes, and Human Genetics

DNA Structure, Replication, and Organization

From DNA to Protein

Regulation of Gene Expression

Bacterial and Viral Genetics

Dna Technologies: Making and Using Genetically Altered Organisms, and Other Applications

Genomes and Proteomes

The Development of Evolutionary Thought

Microevolution: Genetic Changes Within Populations

Speciation

Paleobiology and Macroevolution

Systematic Biology: Phylogeny and Classification

The Origin of Life

Prokaryotes and Viruses

Protists

Seedless Plants

Seed Plants

Fungi

Animal Phylogeny, Acoelomates, and Protostomes

Deuterostomes: Vertebrates and Their Closest Relatives

The Plant Body

Transport in Plants

Plant Nutrition

Reproduction and Development in Flowering Plants

Plant Signals and Responses to the Environment

Introduction to Animal Organization and Physiology

Information Flow and the Neuron

Nervous Systems

Sensory Systems

The Endocrine System

Muscles, Bones, and Body Movements

The Circulatory System

Defenses Against Disease

Gas Exchange: the Respiratory System

Animal Nutrition

Regulating the Internal Environment

Animal Reproduction

Animal Development

Ecology and the Biosphere

Population Interactions and Community Ecology

Ecosystems

Biodiversity and Conservation Biology

Animal Behavior

Filters

Crowding ____.

The intrinsic rate of increase is for bacteria, protists, and animals with short generation times and for those with long generation time.

A population's ____ occurs under ideal, unrealistic conditions.

Research has shown that commercial fisheries place selective pressure on fish populations by harvesting mostly the fish, resulting in .

Populations in which environmental conditions don't vary much within a habitat tend to have ____ dispersion.

Which trait is characteristic of a K -selected species?