Question 1

How do predators reduce the impact of disease on prey species populations?

Accepted Answer

Predators often remove the weakest indiv

Question 2

Explain how temperature,ticks,moose,and wolves are all related.

Accepted Answer

Warm temperatures favor ticks,resulting

Question 3

Why do ecologists count representative samples of a population and not the total population under study?

Accepted Answer

A)  to get a precise number 
B)  because it is impractical to count all the members of the population 
C)  because it is the way that ecologists study ecosystems 
D)  to get an estimate before counting the whole population 
E)  because a representative sample more accurately reflects the carrying capacity 
A)  to get a precise number 
B)  because it is impractical to count all the members of the population 
C)  because it is the way that ecologists study ecosystems 
D)  to get an estimate before counting the whole population 
E)  because a representative sample more accurately reflects the carrying capacity

Question 4

Explain how the environment limits population growth.

Accepted Answer

The environment has limited resources,su

Question 5

Some scientists claim that the human population has exceeded or will rapidly exceed the planet's carrying capacity.Other scientists believe that the ingenuity and inventive nature of the human species will always allow us to develop new technologies and new resources,thereby always pushing the planet's carrying capacity higher.Discuss both of these points of view (POV),supporting your reasoning.

Accepted Answer

POV 1: Increasing human population decre

Question 6

A few years after a prey species population decreases,the _____.

Accepted Answer

A)  predator population will increase 
B)  prey population must decrease 
C)  predator population will decrease 
D)  predator population will exceed carrying capacity 
E)  prey population will exceed carrying capacity 
A)  predator population will increase 
B)  prey population must decrease 
C)  predator population will decrease 
D)  predator population will exceed carrying capacity 
E)  prey population will exceed carrying capacity

Question 7

You are studying two populations of rabbits living in similar habitats.The first population has 1000 individuals/km2,and the second population has only 100 individuals/km2.You notice that when factor A is present,half the rabbits die in each population.When factor B is present,20% of the first population die and none of rabbits in the second population die.Which factor is density dependent and which factor is density independent? Explain your answer.

Accepted Answer

Factor A must be density independent bec

Question 8

The difference between birth rate and death rate is known as

Accepted Answer

A)  the survival rate. 
B)  the logistic rate. 
C)  the growth rate. 
D)  the differential factor 
E)  the survivorship curve. 
A)  the survival rate. 
B)  the logistic rate. 
C)  the growth rate. 
D)  the differential factor 
E)  the survivorship curve.

Question 9

Which would NOT be examined in the study of a community?

Accepted Answer

A)  prey population 
B)  predator population 
C)  trees and vegetation 
D)  rainfall and drought 
E)  All of the above. 
A)  prey population 
B)  predator population 
C)  trees and vegetation 
D)  rainfall and drought 
E)  All of the above.

Question 10

Climate change can affect

Accepted Answer

A)  communities. 
B)  populations. 
C)  biomes. 
D)  ecosystems. 
E)  All of the above. 
A)  communities. 
B)  populations. 
C)  biomes. 
D)  ecosystems. 
E)  All of the above.

Question 11

In the absence of a predator species,herbivores like moose _____.

Accepted Answer

A)  will continue to have an exponential growth rate 
B)  will almost always die off because of the presence of density-dependent diseases 
C)  may exceed carrying capacity and have a fast die-off 
D)  will evolve to no longer require predators to balance their population size 
E)  may eventually become omnivores 
A)  will continue to have an exponential growth rate 
B)  will almost always die off because of the presence of density-dependent diseases 
C)  may exceed carrying capacity and have a fast die-off 
D)  will evolve to no longer require predators to balance their population size 
E)  may eventually become omnivores

Question 12

Why do trees fluctuate with wolf-moose,predator-prey population cycles?

Accepted Answer

A)  They are a predator food source. 
B)  They are a prey food source. 
C)  They are dependent on predators. 
D)  They are dependent on decomposers. 
E)  They grow best when the ends of branches are eaten. 
A)  They are a predator food source. 
B)  They are a prey food source. 
C)  They are dependent on predators. 
D)  They are dependent on decomposers. 
E)  They grow best when the ends of branches are eaten.

Question 13

A population limited by environmental factors would be an example of

Accepted Answer

A)  logistic growth. 
B)  exponential growth. 
C)  logarithmic growth. 
D)  arithmetic growth. 
E)  linear growth. 
A)  logistic growth. 
B)  exponential growth. 
C)  logarithmic growth. 
D)  arithmetic growth. 
E)  linear growth.

Question 14

List three sources of data scientists might use to monitor the health of a population and what each of those sources can tell you.

Accepted Answer

Scat can tell you about diet a

Question 15

Define population.

Accepted Answer

all of the

Question 16

An increase in predator numbers is usually followed by a subsequent

Accepted Answer

A)  decrease in predator numbers. 
B)  decrease in prey numbers. 
C)  increase in prey numbers. 
D)  extinction of prey. 
E)  extinction of predators. 
A)  decrease in predator numbers. 
B)  decrease in prey numbers. 
C)  increase in prey numbers. 
D)  extinction of prey. 
E)  extinction of predators.

Question 17

Define community.

Accepted Answer

two or mor

Question 18

You are tasked with estimating the population size of three species of animals occurring in a national park.One occurs in a random distribution pattern,the second in a clumped pattern,and the third in a uniform pattern.Below,list the three,and for each one describe any problems you might encounter and how you would estimate population size given those problems and that pattern.Finally,comment on how accurate that estimate might be.

Accepted Answer

Random-Individuals may be difficult to f

Question 19

Food abundance is an example of a(n)_________ factor that is also a density-__________ factor,and a hurricane is an example of a(n)________ factor that is density __________.

Accepted Answer

A)  abiotic; independent; abiotic; dependent 
B)  abiotic; dependent; biotic; independent 
C)  biotic; independent; abiotic; dependent 
D)  biotic; dependent; abiotic; independent 
E)  biotic; dependent; abiotic; dependent 
A)  abiotic; independent; abiotic; dependent 
B)  abiotic; dependent; biotic; independent 
C)  biotic; independent; abiotic; dependent 
D)  biotic; dependent; abiotic; independent 
E)  biotic; dependent; abiotic; dependent

Question 20

Which of the following BEST describes the growth curves of predator and prey?

Accepted Answer

A)  zero growth rate for each population 
B)  exponential growth for both until carrying capacity is reached 
C)  interdependent cycles of boom and bust or hills and valleys 
D)  logistic growth until carrying capacity is reached 
E)  a leveling off of growth when the natural increase is zero 
A)  zero growth rate for each population 
B)  exponential growth for both until carrying capacity is reached 
C)  interdependent cycles of boom and bust or hills and valleys 
D)  logistic growth until carrying capacity is reached 
E)  a leveling off of growth when the natural increase is zero

Exam 21: B: Population Ecology on the Tracks of Wolves and Moose

How do predators reduce the impact of disease on prey species populations?

Explain how temperature,ticks,moose,and wolves are all related.

Why do ecologists count representative samples of a population and not the total population under study?

Explain how the environment limits population growth.

A few years after a prey species population decreases,the _____.

The difference between birth rate and death rate is known as

Which would NOT be examined in the study of a community?

Climate change can affect

In the absence of a predator species,herbivores like moose _____.

Why do trees fluctuate with wolf-moose,predator-prey population cycles?

A population limited by environmental factors would be an example of

List three sources of data scientists might use to monitor the health of a population and what each of those sources can tell you.

Define population.

An increase in predator numbers is usually followed by a subsequent

Define community.

Food abundance is an example of a(n)_________ factor that is also a density-__________ factor,and a hurricane is an example of a(n)________ factor that is density __________.

Which of the following BEST describes the growth curves of predator and prey?

The Process of Science Java Report

Chemistry and Molecules of Life Mission to Mars

Cell Function and Structure Wonder Drug

Nutrition,metabolism,enzymes the Peanut Butter Project

Energy Flow and Photosynthesis the Future of Fuel

Dietary Energy and Cellular Respiration Supersize Me

DNA Structure and Replication Biologically Unique

Genes to Proteins Medicine From Milk

Cell Division and Mitosis Natures Pharmacy

Mutations and Cancer Fighting Fate

Single-Gene Inheritance and Meiosis Rock for a Cause

Complex Inheritance Qa: Genetics

Stem Cells and Cell Differentiation Grow Your Own

Natural Selection and Adaptation Bugs That Resist Drugs

A: Nonadaptive Evolution and Speciation Urban Evolution

B: Nonadaptive Evolution and Speciation Urban Evolution

Evidence for Evolution a Fish With Fingers

Life on Earth Qa: Evolution

Prokaryotic Diversity Lost City

A: Eukaryotic Diversity Rain Forest Riches

B: Eukaryotic Diversity Rain Forest Riches

Human Evolution Skin Deep

A: Population Ecology on the Tracks of Wolves and Moose

A: Community Ecology Whats Happening to Honey Bees

B: Community Ecology Whats Happening to Honey Bees

A: Ecosystem Ecology the Heat Is on

B: Ecosystem Ecology the Heat Is on

A: Sustainability the Makings of a Green City

B: Sustainability the Makings of a Green City

A: Overview of Physiology Man Versus Mountain

B: Overview of Physiology Man Versus Mountain

Digestive System Drastic Measures

A: Cardiovascular System Death in Bogalusa

B: Cardiovascular System Death in Bogalusa

Respiratory System Peak Performance

A: Central Nervous System Smoke on the Brain

B: Central Nervous System Smoke on the Brain

Reproductive System Too Many Multiples

Immune System Viral Mysteries

A: Plant Physiology

B: Plant Physiology

Filters

Food abundance is an example of a(n)_ factor that is also a density- factor,and a hurricane is an example of a(n) factor that is density ____.