Question 1

The Great Dane and the chihuahua are both domestic dogs (the same species), but mating between them is limited because of:

Accepted Answer

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

Question 2

Oceanic islands are not the only geographic habitats that can harbor isolated populations of individuals. What are some other examples of isolated "island" populations?

Accepted Answer

Any habitat that contains a boundary tha

Question 3

In northern Minnesota, the lynx (Lynx Canadensis)habitat overlaps the bobcat (Lynx rufus)habitat. The two can breed and produce healthy, fertile offspring, which could lead to:

Accepted Answer

A) gametic incompatibility. 
B) geographic isolation. 
C) hybrid infertility. 
D) extinction of one or both species. 
E) hybrid inviability. 
A) gametic incompatibility. 
B) geographic isolation. 
C) hybrid infertility. 
D) extinction of one or both species. 
E) hybrid inviability.

Question 4

When hybrid offspring are created between species but are unable to breed successfully, it is referred to as ________.

Accepted Answer

The answer of When hybrid offspring are created between species...

Question 5

What two main factors affect speciation, according to Ernst Mayr?

Accepted Answer

The factor

Question 6

Horses and donkeys can mate successfully to produce mules, which are always sterile. Which genetic isolating mechanism prevents horses and donkeys from becoming a single species?

Accepted Answer

A) hybrid inviability 
B) hybrid infertility 
C) mechanical isolation 
D) behavioral isolation 
E) temporal isolation 
A) hybrid inviability 
B) hybrid infertility 
C) mechanical isolation 
D) behavioral isolation 
E) temporal isolation

Question 7

Researchers believe that at least ________ of the species that have lived on Earth have become extinct.

Accepted Answer

The answer of Researchers believe that at least ________ of...

Question 8

The immediate cause of most extinctions is:

Accepted Answer

A) genetic drift. 
B) overspecialization. 
C) environmental change. 
D) hybridization. 
E) wide distribution. 
A) genetic drift. 
B) overspecialization. 
C) environmental change. 
D) hybridization. 
E) wide distribution.

Question 9

Two species of pines, Pinus radiata and Pinus muricota, live in the same regions of California and are capable of forming hybrids under laboratory conditions. However, they do not interbreed because one releases pollen in February and the other in April. What genetic isolating mechanism is involved?

Accepted Answer

A) ecological 
B) temporal 
C) gametic 
D) geographic 
E) hybrid inviability 
A) ecological 
B) temporal 
C) gametic 
D) geographic 
E) hybrid inviability

Question 10

The introduction of a new species into an area that has several differing habitats and very rich resources but no predators will likely lead to:

Accepted Answer

A) extinctions. 
B) mechanical incompatibility. 
C) limited speciation. 
D) adaptive radiation. 
E) temporal isolation. 
A) extinctions. 
B) mechanical incompatibility. 
C) limited speciation. 
D) adaptive radiation. 
E) temporal isolation.

Question 11

A European species of marsh grass called Spartina maritima has a diploid number (2n)of 60. A similar species native to North America, S. alterniflora, has 2n = 62. In 1835 the North American species was found growing near the European species in Southampton, England, after being accidentally imported. Occasional sterile hybrids were noted. In 1895 a new species, S. anglica, was first identified at Southampton and subsequently became very common. The new species has been identified as a fertile hybrid of the original two species. What is the 2n chromosome number of the hybrids that formed from the original two species S. maritima and S. alterniflora?

Accepted Answer

A) 31 
B) 60 
C) 61 
D) 122 
E) 153 
A) 31 
B) 60 
C) 61 
D) 122 
E) 153

Question 12

Eastern and Western meadowlarks look almost identical and sometimes inhabit the same areas of prairies. These birds recognize members of their own species by distinctive songs and thus do not breed with each other. This is an example of:

Accepted Answer

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

Exam 16: The Origin of Species

The Great Dane and the chihuahua are both domestic dogs (the same species), but mating between them is limited because of:

Oceanic islands are not the only geographic habitats that can harbor isolated populations of individuals. What are some other examples of isolated "island" populations?

In northern Minnesota, the lynx (Lynx Canadensis)habitat overlaps the bobcat (Lynx rufus)habitat. The two can breed and produce healthy, fertile offspring, which could lead to:

When hybrid offspring are created between species but are unable to breed successfully, it is referred to as ________.

What two main factors affect speciation, according to Ernst Mayr?

Horses and donkeys can mate successfully to produce mules, which are always sterile. Which genetic isolating mechanism prevents horses and donkeys from becoming a single species?

Researchers believe that at least ________ of the species that have lived on Earth have become extinct.

The immediate cause of most extinctions is:

The introduction of a new species into an area that has several differing habitats and very rich resources but no predators will likely lead to:

Eastern and Western meadowlarks look almost identical and sometimes inhabit the same areas of prairies. These birds recognize members of their own species by distinctive songs and thus do not breed with each other. This is an example of:

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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