Question 1

Uniform spacing patterns in plants such as the creosote bush are most often associated with ________.

Accepted Answer

A)  patterns of high humidity 
B)  the random distribution of seeds 
C)  competitive interaction between individuals of the same population 
D)  the concentration of nutrients within the population's range 
A)  patterns of high humidity 
B)  the random distribution of seeds 
C)  competitive interaction between individuals of the same population 
D)  the concentration of nutrients within the population's range

Question 2

Use the graph to answer the following question.
 
In the figure, which of the arrows represents the carrying capacity?

Accepted Answer

A)  arrow A 
B)  arrow B 
C)  arrow C 
D)  Carrying capacity cannot be found in the figure because species under density-dependent control never reach carrying capacity. 
A)  arrow A 
B)  arrow B 
C)  arrow C 
D)  Carrying capacity cannot be found in the figure because species under density-dependent control never reach carrying capacity.

Question 3

Which of the following graphs illustrates the growth over several seasons of a population of snowshoe hares that were introduced to an appropriate habitat also inhabited by predators in northern Canada?

Accepted Answer

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

Question 4

Which of the following assumptions must be made regarding the mark-recapture estimate of population size?
I.Marked and unmarked individuals have the same probability of being trapped.
II.The marked individuals have thoroughly mixed with the population after being marked.
III.No individuals have entered or left the population by immigration or emigration, and no individuals have been added by birth or eliminated by death during the course of the estimate.

Accepted Answer

A)  I only 
B)  II only 
C)  I and II only 
D)  I, II, and III 
A)  I only 
B)  II only 
C)  I and II only 
D)  I, II, and III

Question 5

Which of the following traits is characteristic of K-selected populations?

Accepted Answer

A)  offspring with good chances of survival 
B)  many offspring per reproductive episode 
C)  small offspring 
D)  a high intrinsic rate of increase 
A)  offspring with good chances of survival 
B)  many offspring per reproductive episode 
C)  small offspring 
D)  a high intrinsic rate of increase

Question 6

Use the graph to answer the following question.
 
In the figure, curves A-D depict per capita rate increases (r). Which of the following best explains the difference between the shapes of these curves?

Accepted Answer

A)  The population growth is logistic as generations continue to form. 
B)  The growth is exponential for curves A and B, but because population growth for C and D is slower, it is considered logistic. 
C)  Population growth within each curve gets steeper as time passes because growth depends on both per capita rates of increase and current population size. 
D)  Curve A has the fastest rate of logistic growth. 
A)  The population growth is logistic as generations continue to form. 
B)  The growth is exponential for curves A and B, but because population growth for C and D is slower, it is considered logistic. 
C)  Population growth within each curve gets steeper as time passes because growth depends on both per capita rates of increase and current population size. 
D)  Curve A has the fastest rate of logistic growth.

Question 7

Use the graph to answer the following question.
 
Which of the following examples are plausible explanations for a population that would produce curve A in the figure?
I.Ongoing predation of rabbits throughout their lives
II.Susceptibility of older humans to heart disease
III.High seedling mortality in sunflowers

Accepted Answer

A)  I only 
B)  II only 
C)  I and II 
D)  II and III 
A)  I only 
B)  II only 
C)  I and II 
D)  II and III

Question 8

A population of ground squirrels has an annual per capita birth rate of 0.06 and an annual per capita death rate of 0.02. Using these birth and death rates, calculate an estimate of the total number of individuals added to (or lost from)a population of 1,000 individuals in one year.

Accepted Answer

A)  120 individuals added 
B)  40 individuals added 
C)  20 individuals added 
D)  400 individuals added 
A)  120 individuals added 
B)  40 individuals added 
C)  20 individuals added 
D)  400 individuals added

Question 9

You observe two breeding female fish of the same species. One female lays 100 eggs and the other female lays 1,000 eggs. Which one of the following outcomes is most likely, given the limits of fitness trade-offs?

Accepted Answer

A)  The female laying 1,000 eggs breeds more often than the female laying 100 eggs. 
B)  The female laying 100 eggs lives longer than the female laying 1,000 eggs. 
C)  The eggs from the female laying 1,000 eggs have larger yolks than the yolks of the eggs from the female laying 100 eggs. 
D)  The female laying 100 eggs is larger than the female laying 1,000 eggs. 
A)  The female laying 1,000 eggs breeds more often than the female laying 100 eggs. 
B)  The female laying 100 eggs lives longer than the female laying 1,000 eggs. 
C)  The eggs from the female laying 1,000 eggs have larger yolks than the yolks of the eggs from the female laying 100 eggs. 
D)  The female laying 100 eggs is larger than the female laying 1,000 eggs.

Exam 53: Population Ecology

Uniform spacing patterns in plants such as the creosote bush are most often associated with ________.

Use the graph to answer the following question. In the figure, which of the arrows represents the carrying capacity?

Which of the following graphs illustrates the growth over several seasons of a population of snowshoe hares that were introduced to an appropriate habitat also inhabited by predators in northern Canada?

Which of the following traits is characteristic of K-selected populations?

Use the graph to answer the following question. In the figure, curves A-D depict per capita rate increases (r). Which of the following best explains the difference between the shapes of these curves?

A population of ground squirrels has an annual per capita birth rate of 0.06 and an annual per capita death rate of 0.02. Using these birth and death rates, calculate an estimate of the total number of individuals added to (or lost from)a population of 1,000 individuals in one year.

You observe two breeding female fish of the same species. One female lays 100 eggs and the other female lays 1,000 eggs. Which one of the following outcomes is most likely, given the limits of fitness trade-offs?

Evolution, the Themes of Biology, and Scientific Inquiry

The Chemical Context of Life

Water and Life

Carbon and the Molecular Diversity of Life

The Structure and Function of Large Biological Molecules

A Tour of the Cell

Membrane Structure and Function

An Introduction to Metabolism

Cellular Respiration and Fermentation

Photosynthesis

Cell Communication

The Cell Cycle

Meiosis and Sexual Life Cycles

Mendel and the Gene Idea

The Chromosomal Basis of Inheritance

The Molecular Basis of Inheritance

Gene Expression: From Gene to Protein

Regulation of Gene Expression

Viruses

DNA Tools and Biotechnology

Genomes and Their Evolution

Descent with Modification: A Darwinian View of Life

The Evolution of Populations

The Origin of Species

The History of Life on Earth

Phylogeny and the Tree of Life

Bacteria and Archaea

Protists

Plant Diversity I: How Plants Colonized Land

Plant Diversity II: The Evolution of Seed Plants

Fungi

An Overview of Animal Diversity

An Introduction to Invertebrates

The Origin and Evolution of Vertebrates

Vascular Plant Structure, Growth, and Development

Resource Acquisition and Transport in Vascular Plants

Soil and Plant Nutrition

Angiosperm Reproduction and Biotechnology

Plant Responses to Internal and External Signals

Basic Principles of Animal Form and Function

Animal Nutrition

Circulation and Gas Exchange

The Immune System

Osmoregulation and Excretion

Hormones and the Endocrine System

Animal Reproduction

Animal Development

Neurons, Synapses, and Signaling

Nervous Systems

Sensory and Motor Mechanisms

Animal Behavior

An Introduction to Ecology and the Biosphere

Community Ecology

Ecosystems and Restoration Ecology

Conservation Biology and Global Change

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