Question 1

The series of events depicted in the figure demonstrates:

Accepted Answer

A) mechanical incompatibility. 
B) hybrid infertility. 
C) allopatric isolation. 
D) behavioral isolation. 
E) temporal isolation. 
A) mechanical incompatibility. 
B) hybrid infertility. 
C) allopatric isolation. 
D) behavioral isolation. 
E) temporal isolation.

Question 2

Two species of squirrels live on either side of the Grand Canyon. It is believed that a long time ago, before being separated by the canyon, they were the same species. This is an example of:

Accepted Answer

A) temporal isolation. 
B) behavioral isolation. 
C) mechanical isolation. 
D) hybrid inviability. 
E) allopatric speciation. 
A) temporal isolation. 
B) behavioral isolation. 
C) mechanical isolation. 
D) hybrid inviability. 
E) allopatric speciation.

Question 3

Hybrid inviability is an example of a ________ isolating mechanism.

Accepted Answer

The answer of Hybrid inviability is an example of a...

Question 4

Two species of flowers that both use honeybees as pollinators but reproduce at different times of yea--one spring, the other midsummerdemonstrate geographic isolation. True or False?

Accepted Answer

A) True 
 B)False

Question 5

Female blue-footed boobies of the Galápagos Islands will mate only after a very specific courtship display on the part of the male. He high-steps to advertise his bright blue feet. What mechanism discourages female blue-footed boobies from mating with other species of boobies that have different courtship displays?

Accepted Answer

A) geographic isolation 
B) ecological isolation 
C) behavioral isolation 
D) temporal isolation 
E) mechanical incompatibility 
A) geographic isolation 
B) ecological isolation 
C) behavioral isolation 
D) temporal isolation 
E) mechanical incompatibility

Question 6

What is the BEST explanation for the origin of the unique species recently found in the Annamite Mountains of Vietnam?

Accepted Answer

A) adaptive radiation 
B) sympatric speciation 
C) allopatric speciation 
D) temporal isolation 
E) behavioral isolation 
A) adaptive radiation 
B) sympatric speciation 
C) allopatric speciation 
D) temporal isolation 
E) behavioral isolation

Question 7

The origins of 300 or more species of cichlid fish in Lake Malawi can BEST be explained by:

Accepted Answer

A) polyploidy. 
B) adaptive radiation. 
C) premating isolating mechanisms. 
D) random events. 
E) the fossil record. 
A) polyploidy. 
B) adaptive radiation. 
C) premating isolating mechanisms. 
D) random events. 
E) the fossil record.

Question 8

Lions and tigers can interbreed and produce offspring called tiglons or ligers, which have normal life spans but are sterile. Lions and tigers remain isolated genetically because of:

Accepted Answer

A) hybrid infertility. 
B) hybrid inviability. 
C) mechanical incompatibility. 
D) behavioral isolation. 
E) heterozygote disadvantage. 
A) hybrid infertility. 
B) hybrid inviability. 
C) mechanical incompatibility. 
D) behavioral isolation. 
E) heterozygote disadvantage.

Question 9

The introduction of a few individuals into a new habitat that is unoccupied by other members of the species is a(n):

Accepted Answer

A) extinction. 
B) adaptive radiation. 
C) limited speciation. 
D) founder event. 
E) temporal isolation. 
A) extinction. 
B) adaptive radiation. 
C) limited speciation. 
D) founder event. 
E) temporal isolation.

Question 10

A horse has a diploid number (2n)of 64 and a donkey has 2n = 62. The hybrid of these two species, mules, have 2n = 63 and are sterile. Why are mules sterile?

Accepted Answer

A) Mules cannot physically mate with each other. 
B) Mules cannot physically mate with horses and donkeys. 
C) One chromosome is unpaired and fails to divide properly during meiosis. 
D) Mules are not true hybrids. 
E) Horses are not able to form new species. 
A) Mules cannot physically mate with each other. 
B) Mules cannot physically mate with horses and donkeys. 
C) One chromosome is unpaired and fails to divide properly during meiosis. 
D) Mules are not true hybrids. 
E) Horses are not able to form new species.

Question 11

Polyploidy is an important mechanism of speciation in plants. True or False?

Accepted Answer

A) True 
 B)False

Question 12

All members of the golden hamster species known today are descendants of a single litter collected in Syria in 1939. Its diploid chromosome number is 44. Two other species of hamster, each with a diploid number of 22, overlap in Syria. The golden hamster is thought to be a new species from the mating of a male and female of the two other hamster species. What mechanism might explain this recent event of speciation?

Accepted Answer

A) adaptive radiation 
B) formation of a fertile hybrid and halving of the chromosome number of this hybrid 
C) polyploidy 
D) temporal isolation 
E) disruptive selection 
A) adaptive radiation 
B) formation of a fertile hybrid and halving of the chromosome number of this hybrid 
C) polyploidy 
D) temporal isolation 
E) disruptive selection

Question 13

Interbreeding two different species of lovebirds produces offspring that are unable to build a nest after they mature because they lack the appropriate innate knowledge needed to carry the nesting materials and build a nest. This limits genetic mixing between the species due to:

Accepted Answer

A) hybrid inviability. 
B) behavioral isolation. 
C) ecological isolation. 
D) mechanical incompatibility. 
E) geographic isolation. 
A) hybrid inviability. 
B) behavioral isolation. 
C) ecological isolation. 
D) mechanical incompatibility. 
E) geographic isolation.

Question 14

Which of the following is an example of adaptive radiation?

Accepted Answer

A) bat wings 
B) industrial melanism 
C) Darwin's finches 
D) long giraffe necks 
E) starfish arms 
A) bat wings 
B) industrial melanism 
C) Darwin's finches 
D) long giraffe necks 
E) starfish arms

Question 15

Which of these definitions of species BEST matches the biological species concept?

Accepted Answer

A) Members of the same species are all morphologically similar. 
B) Members of the same species are all genetically identical. 
C) Members of the same species look almost exactly alike. 
D) Members of the same species are whatever an expert says they are. 
E) Members of the same species can mate and produce fertile offspring. 
A) Members of the same species are all morphologically similar. 
B) Members of the same species are all genetically identical. 
C) Members of the same species look almost exactly alike. 
D) Members of the same species are whatever an expert says they are. 
E) Members of the same species can mate and produce fertile offspring.

Question 16

One method of protecting the genetic isolation of a population is the inability of sperm to fertilize eggs of a different species. This is called:

Accepted Answer

A) ecological isolation. 
B) temporal isolation. 
C) behavioral isolation. 
D) hybrid inviability. 
E) gametic incompatibility. 
A) ecological isolation. 
B) temporal isolation. 
C) behavioral isolation. 
D) hybrid inviability. 
E) gametic incompatibility.

Question 17

When two organisms reach sexual maturity at different times, it is an example of:

Accepted Answer

A) temporal isolation. 
B) hybrid inviability. 
C) hybrid infertility. 
D) hybrid vigor. 
E) gametic incompatibility. 
A) temporal isolation. 
B) hybrid inviability. 
C) hybrid infertility. 
D) hybrid vigor. 
E) gametic incompatibility.

Question 18

Which species is MOST likely to become extinct?

Accepted Answer

A) the white tiger beetle, found throughout several mid-Atlantic U.S. states 
B) Kirtland's warbler, which breeds in only a small area of Michigan 
C) the jack-in-the-pulpit, found throughout the eastern United States and Canada 
D) the northeastern pygmy shrew, found throughout New Jersey and Pennsylvania 
E) carp, found throughout Europe, the United States, and Canada 
A) the white tiger beetle, found throughout several mid-Atlantic U.S. states 
B) Kirtland's warbler, which breeds in only a small area of Michigan 
C) the jack-in-the-pulpit, found throughout the eastern United States and Canada 
D) the northeastern pygmy shrew, found throughout New Jersey and Pennsylvania 
E) carp, found throughout Europe, the United States, and Canada

Question 19

A flower has four copies of each chromosome. This is an example of ________.

Accepted Answer

The answer of A flower has four copies of each...

Question 20

Explain why naming and describing species based only on their appearance can be problematic.

Accepted Answer

In some cases, individuals that look the

Exam 16: The Origin of Species

The series of events depicted in the figure demonstrates:

Two species of squirrels live on either side of the Grand Canyon. It is believed that a long time ago, before being separated by the canyon, they were the same species. This is an example of:

Hybrid inviability is an example of a ________ isolating mechanism.

Two species of flowers that both use honeybees as pollinators but reproduce at different times of yea--one spring, the other midsummerdemonstrate geographic isolation. True or False?

What is the BEST explanation for the origin of the unique species recently found in the Annamite Mountains of Vietnam?

The origins of 300 or more species of cichlid fish in Lake Malawi can BEST be explained by:

Lions and tigers can interbreed and produce offspring called tiglons or ligers, which have normal life spans but are sterile. Lions and tigers remain isolated genetically because of:

The introduction of a few individuals into a new habitat that is unoccupied by other members of the species is a(n):

A horse has a diploid number (2n)of 64 and a donkey has 2n = 62. The hybrid of these two species, mules, have 2n = 63 and are sterile. Why are mules sterile?

Polyploidy is an important mechanism of speciation in plants. True or False?

Interbreeding two different species of lovebirds produces offspring that are unable to build a nest after they mature because they lack the appropriate innate knowledge needed to carry the nesting materials and build a nest. This limits genetic mixing between the species due to:

Which of the following is an example of adaptive radiation?

Which of these definitions of species BEST matches the biological species concept?

One method of protecting the genetic isolation of a population is the inability of sperm to fertilize eggs of a different species. This is called:

When two organisms reach sexual maturity at different times, it is an example of:

Which species is MOST likely to become extinct?

A flower has four copies of each chromosome. This is an example of ________.

Explain why naming and describing species based only on their appearance can be problematic.

An Introduction to Life on Earth

Atoms, Molecules, and Life

Biological Molecules

Cell Structure and Function

Cell Membrane Structure and Function

Energy Flow in the Life of a Cell

Capturing Solar Energy: Photosynthesis

Harvesting Energy: Glycolysis and Cellular Respiration

The Continuity of Life: Cellular Reproduction

Patterns of Inheritance

Dna: the Molecule of Heredity

Gene Expression and Regulation

Biotechnology

Principles of Evolution

How Populations Evolve

The History of Life

Systematics: Seeking Order Amidst Diversity

The Diversity of Prokaryotes and Viruses

The Diversity of Protists

The Diversity of Plants

The Diversity of Fungi

Animal Diversity I: Invertebrates

Animal Diversity Ii: Vertebrates

Animal Behavior

Population Growth and Regulation

Community Interactions

How Do Ecosystems Work

Earths Diverse Ecosystems

Conserving Earths Biodiversity

Homeostasis and the Organization of the Animal Body

Circulation

Respiration

Nutrition and Digestion

The Urinary System

Defenses Against Disease

Chemical Control of the Animal Body: the Endocrine System

The Nervous System

The Senses

Action and Support: the Muscles and Skeleton

Animal Reproduction

Animal Development

Plant Anatomy and Nutrient Transport

Plant Reproduction and Development

Plant Responses to the Environment

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