Question 1

Scramble competition results when all individuals in a population share the limited resources.
____________________

Accepted Answer

A) True 
 B)False

Question 2

Pest or weedy species are typically __________ and exhibit type __________ survivorship curves.

Accepted Answer

A)  r-selected; I 
B)  r-selected; II 
C)  r-selected; III 
D)  K-selected; I 
E)  K-selected; III 
A)  r-selected; I 
B)  r-selected; II 
C)  r-selected; III 
D)  K-selected; I 
E)  K-selected; III

Question 3

A killing frost is an example of a density-independent factor.
____________________

Accepted Answer

A) True 
 B)False

Question 4

Interference competition is also called contest competition.
____________________

Accepted Answer

A) True 
 B)False

Question 5

Write out the growth equation including the following factors: natality, mortality, immigration, and emigration.Provide a one-sentence explanation for the impact of each of these factors on the population growth rate.

Accepted Answer

dN/dt = N[(b-d) + (i-e)]
b = n

Question 6

Populations that experience significant contest competition:

Accepted Answer

A)  show small changes in population size over time. 
B)  show great changes in population size over time. 
C)  are particularly susceptible to extinction. 
D)  show little intraspecific competition. 
E)  are characteristic of environments with abundant resources. 
A)  show small changes in population size over time. 
B)  show great changes in population size over time. 
C)  are particularly susceptible to extinction. 
D)  show little intraspecific competition. 
E)  are characteristic of environments with abundant resources.

Question 7

Natural selection acts most directly on:

Accepted Answer

A)  populations. 
B)  communities. 
C)  ecosystems. 
D)  the biosphere. 
E)  K-selected organisms. 
A)  populations. 
B)  communities. 
C)  ecosystems. 
D)  the biosphere. 
E)  K-selected organisms.

Question 8

The most common spacing is random dispersion.
____________________

Accepted Answer

A) True 
 B)False

Question 9

An example of a density-dependent factor that influences the size of a population is:

Accepted Answer

A)  rainfall. 
B)  temperature. 
C)  a fire. 
D)  parasites. 
E)  an earthquake. 
A)  rainfall. 
B)  temperature. 
C)  a fire. 
D)  parasites. 
E)  an earthquake.

Question 10

A(n) exponential growth curve levels off at the carrying capacity.
____________________

Accepted Answer

A) True 
 B)False

Question 11

Compare and contrast Type I and Type III survivorship curves.Sketch a correctly labeled graph to support your comparison.BONUS: Identify two organisms that represent each of the two types of survivorship strategies discussed here.

Accepted Answer

The sketch should resemble Fig.53-8 on t

Question 12

The average number of children born to a woman during her lifetime is known as:

Accepted Answer

A)  age structure. 
B)  replacement-level fertility. 
C)  natality. 
D)  total fertility rate. 
E)  infant mortality rate. 
A)  age structure. 
B)  replacement-level fertility. 
C)  natality. 
D)  total fertility rate. 
E)  infant mortality rate.

Question 13

Iteroparity is common in which of the following organisms?

Accepted Answer

A)  perennial herbaceous plants 
B)  most insects 
C)  agaves 
D)  most invertebrates 
E)  Pacific salmon 
A)  perennial herbaceous plants 
B)  most insects 
C)  agaves 
D)  most invertebrates 
E)  Pacific salmon

Question 14

Figure 53-3
Use the figure to answer the corresponding question(s).  
-Based on Figure 53-3, the decline in the moose population in 1996 was most likely due to:

Accepted Answer

A)  a predictable increase in the wolf population. 
B)  an unpredictable increase in the wolf population. 
C)  a decrease in the intrinsic rate of increase for the moose population. 
D)  a decline in the food supply. 
E)  an unknown disease organism. 
A)  a predictable increase in the wolf population. 
B)  an unpredictable increase in the wolf population. 
C)  a decrease in the intrinsic rate of increase for the moose population. 
D)  a decline in the food supply. 
E)  an unknown disease organism.

Question 15

In a population characterized by type III survivorship, the probability of survival __________ with age.

Accepted Answer

A)  increases 
B)  decreases 
C)  does not change 
D)  first decreases then increases 
E)  first increases then decreases 
A)  increases 
B)  decreases 
C)  does not change 
D)  first decreases then increases 
E)  first increases then decreases

Question 16

The largest population that can be maintained in an environment for an indefinite period of time is called the carrying capacity.
____________________

Accepted Answer

A) True 
 B)False

Question 17

Density-independent factors:

Accepted Answer

A)  influence population size and are in turn influenced by changes in population density. 
B)  may be the result of intense interspecific competition. 
C)  are typically abiotic. 
D)  may include parasites. 
E)  may include diseases. 
A)  influence population size and are in turn influenced by changes in population density. 
B)  may be the result of intense interspecific competition. 
C)  are typically abiotic. 
D)  may include parasites. 
E)  may include diseases.

Exam 53: Introduction to Ecology: Population Ecology

Scramble competition results when all individuals in a population share the limited resources. ____________________

Pest or weedy species are typically __________ and exhibit type __________ survivorship curves.

A killing frost is an example of a density-independent factor. ____________________

Interference competition is also called contest competition. ____________________

Write out the growth equation including the following factors: natality, mortality, immigration, and emigration.Provide a one-sentence explanation for the impact of each of these factors on the population growth rate.

Populations that experience significant contest competition:

Natural selection acts most directly on:

The most common spacing is random dispersion. ____________________

An example of a density-dependent factor that influences the size of a population is:

A(n) exponential growth curve levels off at the carrying capacity. ____________________

Compare and contrast Type I and Type III survivorship curves.Sketch a correctly labeled graph to support your comparison.BONUS: Identify two organisms that represent each of the two types of survivorship strategies discussed here.

The average number of children born to a woman during her lifetime is known as:

Iteroparity is common in which of the following organisms?

Figure 53-3 Use the figure to answer the corresponding question(s). -Based on Figure 53-3, the decline in the moose population in 1996 was most likely due to:

In a population characterized by type III survivorship, the probability of survival __________ with age.

The largest population that can be maintained in an environment for an indefinite period of time is called the carrying capacity. ____________________

Density-independent factors:

A View of Life

Atoms and Molecules: the Chemical Basis of Life

The Chemistry of Life: Organic Compounds

Organization of the Cell

Biological Membranes

Cell Communication

Energy and Metabolism

How Cells Make Atp: Energy-Releasing Pathways

Photosynthesis: Capturing Light Energy

Chromosomes, Mitosis, and Meiosis

The Basic Principles of Heredity

Dna: the Carrier of Genetic Information

Gene Expression

Gene Regulation

Dna Technology and Genomics

Human Genetics and the Human Genome

Developmental Genetics

Introduction to Darwinian Evolution

Evolutionary Change in Populations

Speciation and Macroevolution

The Origin and Evolutionary History of Life

The Evolution of Primates

Understanding Diversity: Systematics

Viruses and Subviral Agents

Bacteria and Archaea

Protists

Seedless Plants

Seed Plants

The Fungi

An Introduction to Animal Diversity

Sponges, Cnidarians, Ctenophores, and Protostomes

The Deuterostomes

Plant Structure, Growth, and Development

Leaf Structure and Function

Stem Structure and Transport

Roots and Mineral Nutrition

Reproduction in Flowering Plants

Plant Developmental Responses to External and Internal Signals

Animal Structure and Function: an Introduction

Protection, Support, and Movement

Neural Signaling

Neural Regulation

Sensory Systems

Internal Transport

The Immune System: Internal Defense

Gas Exchange

Processing Food and Nutrition

Osmoregulation and Disposal of Metabolic Wastes

Endocrine Regulation

Reproduction

Animal Development

Animal Behavior

Community Ecology

Ecosystems and the Biosphere

Ecology and the Geography of Life

Biological Diversity and Conservation Biology

Filters

Pest or weedy species are typically and exhibit type survivorship curves.