Question 1

Estimates of current rates of extinction

Accepted Answer

A) indicate that we have reached a state of stable equilibrium in which speciation rates equal extinction rates. 
B) suggest that one-half of all animal and plant species may be gone by the year 2100. 
C) indicate that rates may be greater than the mass extinctions at the close of the Cretaceous period. 
D) indicate that only 1% of all of the species that have ever lived on Earth are still alive. 
E) suggest that rates of extinction have decreased globally. 
A) indicate that we have reached a state of stable equilibrium in which speciation rates equal extinction rates. 
B) suggest that one-half of all animal and plant species may be gone by the year 2100. 
C) indicate that rates may be greater than the mass extinctions at the close of the Cretaceous period. 
D) indicate that only 1% of all of the species that have ever lived on Earth are still alive. 
E) suggest that rates of extinction have decreased globally.

Question 2

Why are changes in the global carbon cycle important?
I.Burning reduces available carbon for primary producers and,therefore,primary consumers.
II.Deforestation and suburbanization reduce an area's net primary productivity.
III.Increasing atmospheric concentrations of carbon dioxide could alter Earth's climate.
IV.By using fossil fuels we are destroying a nonrenewable resource.

Accepted Answer

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

Question 3

Key goals of zoned reserves include all of the following,except

Accepted Answer

A) provide a stable economy for people living in the area 
B) protect wildlife 
C) practice sustainable agriculture 
D) promote ecotourism 
E) remove all human presence and activity 
A) provide a stable economy for people living in the area 
B) protect wildlife 
C) practice sustainable agriculture 
D) promote ecotourism 
E) remove all human presence and activity

Question 4

Which of the following species was driven to extinction by overexploitation by hunters/fishermen?

Accepted Answer

A) African elephant 
B) the great auk 
C) North American bluefin tuna 
D) flying foxes 
E) American bison 
A) African elephant 
B) the great auk 
C) North American bluefin tuna 
D) flying foxes 
E) American bison

Question 5

Which of the following groups is most threatened by global extinctions?

Accepted Answer

A) mammals 
B) birds 
C) fish 
D) amphibians 
E) plants 
A) mammals 
B) birds 
C) fish 
D) amphibians 
E) plants

Question 6

Review the formula for effective population size.Imagine a population of 1000 small rodents.Of these,300 are breeding females,300 are breeding males,and 400 are nonbreeding juveniles.What is the effective population size?

Accepted Answer

A) 1000 
B) 1200 
C) 600 
D) 400 
E) 300 
A) 1000 
B) 1200 
C) 600 
D) 400 
E) 300

Question 7

The main cause of the increase in the amount of CO₂ in Earth's atmosphere over the past 150 years is

Accepted Answer

A) increased worldwide primary production. 
B) increased worldwide standing crop. 
C) an increase in the amount of infrared radiation absorbed by the atmosphere. 
D) the burning of larger amounts of wood and fossil fuels. 
E) additional respiration by the rapidly growing human population. 
A) increased worldwide primary production. 
B) increased worldwide standing crop. 
C) an increase in the amount of infrared radiation absorbed by the atmosphere. 
D) the burning of larger amounts of wood and fossil fuels. 
E) additional respiration by the rapidly growing human population.

Question 8

The most serious consequence of a decrease in global biodiversity would be the

Accepted Answer

A) increase in global warming and thinning of the ozone layer. 
B) potential loss of ecosystem services on which people depend. 
C) increase in the abundance and diversity of edge-adapted species. 
D) loss of source of genetic diversity to preserve endangered species. 
E) loss of species for "bioprospecting." 
A) increase in global warming and thinning of the ozone layer. 
B) potential loss of ecosystem services on which people depend. 
C) increase in the abundance and diversity of edge-adapted species. 
D) loss of source of genetic diversity to preserve endangered species. 
E) loss of species for "bioprospecting."

Question 9

The introduction of the brown tree snake in the 1940s to the island of Guam has resulted in

Accepted Answer

A) eradication of non-native rats and other undesirable/pest species. 
B) the extirpation of many of the island's bird and reptile species. 
C) a good lesson in biological control. 
D) a new species of hybrids from crossbreeding with a native snake species. 
E) its failure to compete with native species and its quick elimination from the island. 
A) eradication of non-native rats and other undesirable/pest species. 
B) the extirpation of many of the island's bird and reptile species. 
C) a good lesson in biological control. 
D) a new species of hybrids from crossbreeding with a native snake species. 
E) its failure to compete with native species and its quick elimination from the island.

Question 10

Which of the following strategies would most rapidly increase the genetic diversity of a population in an extinction vortex?

Accepted Answer

A) Capture all remaining individuals in the population for captive breeding followed by reintroduction to the wild. 
B) Establish a reserve that protects the population's habitat. 
C) Introduce new individuals transported from other populations of the same species. 
D) Sterilize the least fit individuals in the population. 
E) Control populations of the endangered population's predators and competitors. 
A) Capture all remaining individuals in the population for captive breeding followed by reintroduction to the wild. 
B) Establish a reserve that protects the population's habitat. 
C) Introduce new individuals transported from other populations of the same species. 
D) Sterilize the least fit individuals in the population. 
E) Control populations of the endangered population's predators and competitors.

Exam 56: Conservation Biology and Global Change

Estimates of current rates of extinction

Key goals of zoned reserves include all of the following,except

Which of the following species was driven to extinction by overexploitation by hunters/fishermen?

Which of the following groups is most threatened by global extinctions?

Review the formula for effective population size.Imagine a population of 1000 small rodents.Of these,300 are breeding females,300 are breeding males,and 400 are nonbreeding juveniles.What is the effective population size?

The main cause of the increase in the amount of CO₂ in Earth's atmosphere over the past 150 years is

The most serious consequence of a decrease in global biodiversity would be the

The introduction of the brown tree snake in the 1940s to the island of Guam has resulted in

Which of the following strategies would most rapidly increase the genetic diversity of a population in an extinction vortex?

Introduction: Evolution and Themes of Biology

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

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

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 Signalling

Nervous Systems

Sensory and Motor Mechanisms

Animal Behaviour

An Introduction to Ecology and the Biosphere

Population Ecology

Community Ecology

Ecosystems and Restoration Ecology

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