Question 1

What situation results from a postfertilization barrier to reproduction?

Accepted Answer

A)  mutations in genes that control development 
B)  offspring that fail to develop 
C)  mechanical isolation of a species 
D)  gamete incompatibility 
A)  mutations in genes that control development 
B)  offspring that fail to develop 
C)  mechanical isolation of a species 
D)  gamete incompatibility B

Question 2

Which of these most accurately describes a single population?

Accepted Answer

A)  all the oak trees in a park 
B)  two coneflower plants in a field of coneflowers 
C)  all the housecats in Montana 
D)  all the gulls in North America 
A)  all the oak trees in a park 
B)  two coneflower plants in a field of coneflowers 
C)  all the housecats in Montana 
D)  all the gulls in North America A

Question 3

What is evolution that occurs as a result of chance events?

Accepted Answer

A)  sexual selection 
B)  genetic drift 
C)  gene flow 
D)  population bottleneck 
A)  sexual selection 
B)  genetic drift 
C)  gene flow 
D)  population bottleneck B

Question 4

Fruit flies all look more or less alike. If you have a male and female fruit fly, how could you test the hypothesis that they're the same species?

Accepted Answer

A)  Determine the sequence of several of their genes. 
B)  Examine them closely under a microscope, and compare what you see to a published description of fruit flies. 
C)  See if they'll mate when they're put together. 
D)  See if they mate and if their offspring can also mate. 
A)  Determine the sequence of several of their genes. 
B)  Examine them closely under a microscope, and compare what you see to a published description of fruit flies. 
C)  See if they'll mate when they're put together. 
D)  See if they mate and if their offspring can also mate.

Question 5

Which situation is an example of behavioral isolation?

Accepted Answer

A)  A species of daisy only blooms when nights become longer than nine hours. 
B)  The offspring of horses and donkeys are sterile. 
C)  The pollen of roses isn't recognized by the eggs of morning glories. 
D)  Female spiders only mate when a male of the same species taps her web in a particular way. 
A)  A species of daisy only blooms when nights become longer than nine hours. 
B)  The offspring of horses and donkeys are sterile. 
C)  The pollen of roses isn't recognized by the eggs of morning glories. 
D)  Female spiders only mate when a male of the same species taps her web in a particular way.

Question 6

-The figure shows that sickle cell allele is not common in every region that malaria is present. Why are there differences in the presence of sickle cell alleles in these locations?

Accepted Answer

A)  The sickle-cell allele only protects against some forms of malaria. 
B)  The sickle-cell allele is adaptive in only some races but not others. 
C)  The sickle-cell allele appeared by chance in certain populations and increased in frequency in those populations after it appeared. 
D)  The areas where sickle-cell and malaria overlap represent migration from the original population where sickle-cell arose. 
A)  The sickle-cell allele only protects against some forms of malaria. 
B)  The sickle-cell allele is adaptive in only some races but not others. 
C)  The sickle-cell allele appeared by chance in certain populations and increased in frequency in those populations after it appeared. 
D)  The areas where sickle-cell and malaria overlap represent migration from the original population where sickle-cell arose.

Question 7

How are human fossils classified into species?

Accepted Answer

A)  by differences in DNA 
B)  by differences in diet 
C)  by differences in skin color 
D)  by differences in the skeleton 
A)  by differences in DNA 
B)  by differences in diet 
C)  by differences in skin color 
D)  by differences in the skeleton

Question 8

True or false: Traits like reduced body hair in many native North American and Asian populations are most likely the result of sexual selection.

Accepted Answer

A) True 
 B)False

Question 9

True or false: Levels of ultraviolet light influence both folate and vitamin D production in humans.

Accepted Answer

A) True 
 B)False

Question 10

Which scenario best describes the terms "subspecies" and "race"?

Accepted Answer

A)  a population of rabbits that lives near a lake and sometimes breeds with rabbits farther inland 
B)  two populations of birds that have different amounts of orange coloration and could produce offspring if they were not separated by a mountain range 
C)  two populations of frogs that cannot produce offspring 
D)  a breed of dog with a longhaired coat instead of a shorthaired coat 
A)  a population of rabbits that lives near a lake and sometimes breeds with rabbits farther inland 
B)  two populations of birds that have different amounts of orange coloration and could produce offspring if they were not separated by a mountain range 
C)  two populations of frogs that cannot produce offspring 
D)  a breed of dog with a longhaired coat instead of a shorthaired coat

Question 11

What results when traits are acted on by sexual selection?

Accepted Answer

A)  The traits increase fertility. 
B)  The traits occur mostly in females. 
C)  The traits sometimes appear to have no relation to fitness. 
D)  The traits occur in plants but not in animals. 
A)  The traits increase fertility. 
B)  The traits occur mostly in females. 
C)  The traits sometimes appear to have no relation to fitness. 
D)  The traits occur in plants but not in animals.

Question 12

True or false: A minimum of 100 years of isolation is required for two populations to accumulate enough differences to be considered different species.

Accepted Answer

A) True 
 B)False

Question 13

Alleles for other genetic diseases also provide protection against malaria when only one copy of the allele is present. In what cell type would you expect these genes to be active?

Accepted Answer

A)  liver cells 
B)  skin cells 
C)  red blood cells 
D)  lung cells 
A)  liver cells 
B)  skin cells 
C)  red blood cells 
D)  lung cells

Question 14

What results after a speciation event?

Accepted Answer

A)  Two species have evolved that are each different from the original species. 
B)  One new species evolves, while the original species stays the same. 
C)  One new species evolves, while the original species may stay the same or evolve into something different. 
D)  One new species evolves, while the original species goes extinct. 
A)  Two species have evolved that are each different from the original species. 
B)  One new species evolves, while the original species stays the same. 
C)  One new species evolves, while the original species may stay the same or evolve into something different. 
D)  One new species evolves, while the original species goes extinct.

Question 15

One species of plant produces flowers when nights are 10 hours long. A related species comes into flower when nights are 9 hours long. What type of reproductive isolation would include this example?

Accepted Answer

A)  gamete incompatibility 
B)  temporal isolation 
C)  mechanical isolation 
D)  behavioral isolation 
A)  gamete incompatibility 
B)  temporal isolation 
C)  mechanical isolation 
D)  behavioral isolation

Question 16

-California tarweed seeds were able to reach the Hawaiian Islands, and a new species emerged from this isolated population. What concept applies to this example?

Accepted Answer

A)  the founder effect 
B)  hybridization 
C)  punctuated equilibrium 
D)  polyploidy 
A)  the founder effect 
B)  hybridization 
C)  punctuated equilibrium 
D)  polyploidy

Question 17

What information would scientists use to calculate allele frequencies in a human population?

Accepted Answer

A)  the Hardy-Weinberg theorem 
B)  DNA technology 
C)  physical characteristics of fossils 
D)  Punnett squares 
A)  the Hardy-Weinberg theorem 
B)  DNA technology 
C)  physical characteristics of fossils 
D)  Punnett squares

Question 18

True or false: When a founder population has a small gene pool, evolutionary change is more likely to be rapid than if the founder population has a large gene pool.

Accepted Answer

A) True 
 B)False

Question 19

How does polyploidy cause reproductive isolation?

Accepted Answer

A)  It changes the timing of reproduction. 
B)  It changes instructions for how to make reproductive anatomy. 
C)  It alters the number of chromosomes in sex cells. 
D)  It changes the prey preference of the organism. 
A)  It changes the timing of reproduction. 
B)  It changes instructions for how to make reproductive anatomy. 
C)  It alters the number of chromosomes in sex cells. 
D)  It changes the prey preference of the organism.

Question 20

What species concept is used by paleontologists as they compare the physical characteristics of fossils to understand human evolution?

Accepted Answer

The answer of What species concept is used by paleontologists...

Exam 12: Who Am I Species and Races

What situation results from a postfertilization barrier to reproduction?

Which of these most accurately describes a single population?

What is evolution that occurs as a result of chance events?

Fruit flies all look more or less alike. If you have a male and female fruit fly, how could you test the hypothesis that they're the same species?

Which situation is an example of behavioral isolation?

-The figure shows that sickle cell allele is not common in every region that malaria is present. Why are there differences in the presence of sickle cell alleles in these locations?

How are human fossils classified into species?

True or false: Traits like reduced body hair in many native North American and Asian populations are most likely the result of sexual selection.

True or false: Levels of ultraviolet light influence both folate and vitamin D production in humans.

Which scenario best describes the terms "subspecies" and "race"?

What results when traits are acted on by sexual selection?

True or false: A minimum of 100 years of isolation is required for two populations to accumulate enough differences to be considered different species.

Alleles for other genetic diseases also provide protection against malaria when only one copy of the allele is present. In what cell type would you expect these genes to be active?

What results after a speciation event?

One species of plant produces flowers when nights are 10 hours long. A related species comes into flower when nights are 9 hours long. What type of reproductive isolation would include this example?

-California tarweed seeds were able to reach the Hawaiian Islands, and a new species emerged from this isolated population. What concept applies to this example?

What information would scientists use to calculate allele frequencies in a human population?

True or false: When a founder population has a small gene pool, evolutionary change is more likely to be rapid than if the founder population has a large gene pool.

How does polyploidy cause reproductive isolation?

What species concept is used by paleontologists as they compare the physical characteristics of fossils to understand human evolution?

Can Science Cure the Common Cold Introduction to the Scientific Method

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Is It Possible to Supplement Your Way to Better Performance and Health

Body Weight and Health: Enzymes, Metabolism, and Cellular Respiration

Life in the Greenhouse: Photosynthesis and Climate Change

Cancer: DNA Synthesis, Mitosis, and Meiosis

Are You Only As Smart As Your Genes Mendelian and Quantitative Genetics

DNA Detective: Complex Patterns of Inheritance and Dna Profiling

Genetically Modified Organisms: Gene Expression, Mutation,

Where Did We Come From the Evidence for Evolution

An Evolving Enemy: Natural Selection

The Greatest Species on Earth Biodiversity and Classification

Is the Human Population Too Large Population Ecology

Conserving Biodiversity: Community and Ecosystem Ecology

Where Do You Live Climate and Biomes

Organ Donation: Tissues and Organs

Binge Drinking: the Digestive and Urinary Systems

Clearing the Air: Respiratory and Cardiovascular Systems

Vaccination: Protection and Prevention or Peril Immune System,

Human Sex Differences: Endocrine, Skeletal, and Muscular Systems

Is There Something in the Water Reproductive and Developmental Biology

Study Drugs: Brain Boost or Brain Drain Brain Structure and Function

Feeding the World: Plant Structure and Growth

Growing a Green Thumb: Plant Physiology

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