Question 1

The genetic equilibrium of a population can be upset by all EXCEPT which of the following?

Accepted Answer

A) mutations 
B) migration 
C) random mating 
D) genetic drift 
E) natural selection 
A) mutations 
B) migration 
C) random mating 
D) genetic drift 
E) natural selection C

Question 2

The difference in the appearance of the male and the female is known as

Accepted Answer

A) polymorphism. 
B) sexual dimorphism. 
C) the dioecious condition. 
D) sexual selection. 
E) a primary sexual characteristic. 
A) polymorphism. 
B) sexual dimorphism. 
C) the dioecious condition. 
D) sexual selection. 
E) a primary sexual characteristic. B

Question 3

For sexually reproducing organisms, a species consists of

Accepted Answer

A) individuals sharing a habitat. 
B) a group of reproductive females. 
C) populations that have the potential to interbreed and produce fertile offspring. 
D) individuals that have the same nutritional requirements. 
E) individuals in the same geographical range with similar ecological requirements. 
A) individuals sharing a habitat. 
B) a group of reproductive females. 
C) populations that have the potential to interbreed and produce fertile offspring. 
D) individuals that have the same nutritional requirements. 
E) individuals in the same geographical range with similar ecological requirements. C

Question 4

The maintenance of Hardy-Weinberg equilibrium is predominant

Accepted Answer

A) when sexual selection occurs. 
B) when mutations occur. 
C) in small populations. 
D) when there is no gene flow between different populations. 
E) when all of these are true. 
A) when sexual selection occurs. 
B) when mutations occur. 
C) in small populations. 
D) when there is no gene flow between different populations. 
E) when all of these are true.

Question 5

Which of the following is true concerning the hybrids produced by parapatric speciation?

Accepted Answer

A) They are more fit than individuals on either side of the contact zone. 
B) They appear commonly on either side of the contact zone. 
C) They are more likely to breed on either side of the contact zone. 
D) They are selected against in the contact zone. 
E) They are less fit than individuals on either side of the contact zone.None of these is true. 
A) They are more fit than individuals on either side of the contact zone. 
B) They appear commonly on either side of the contact zone. 
C) They are more likely to breed on either side of the contact zone. 
D) They are selected against in the contact zone. 
E) They are less fit than individuals on either side of the contact zone.None of these is true.

Question 6

Which of the following is (are) a group of individuals of the same species that occupies a specified area?

Accepted Answer

A) individuals 
B) species 
C) population 
D) polyploids 
E) all of these 
A) individuals 
B) species 
C) population 
D) polyploids 
E) all of these

Question 7

The greatest contributor(s) to allopatric isolation is (are)

Accepted Answer

A) geographic barriers. 
B) differences in reproductive timing. 
C) gametic incompatibility. 
D) hybrid inviability. 
E) behavioral peculiarities. 
A) geographic barriers. 
B) differences in reproductive timing. 
C) gametic incompatibility. 
D) hybrid inviability. 
E) behavioral peculiarities.

Question 8

Which of the following is NOT true about the Hardy-Weinberg formula?

Accepted Answer

A) It is helpful to doctors and genetic counselors. 
B) It can predict the carrier frequency of alleles known to cause genetic disorders. 
C) It can explain why some individuals absorb too much iron from their food. 
D) The math is useful in research on the effects of a mutant BRCA2 allele. 
E) It can predict that the frequency of hemochromatosis carriers in Irish populations is 0.24 
A) It is helpful to doctors and genetic counselors. 
B) It can predict the carrier frequency of alleles known to cause genetic disorders. 
C) It can explain why some individuals absorb too much iron from their food. 
D) The math is useful in research on the effects of a mutant BRCA2 allele. 
E) It can predict that the frequency of hemochromatosis carriers in Irish populations is 0.24

Question 9

If this population of butterflies is in genetic equilibrium, the frequency of the homozygous dominant genotype in the new generation will be

Accepted Answer

A) p2. 
B) 2pq. 
C) p2 + q2. 
D) 490 AA. 
E) p2 and 490 AA. 
A) p2. 
B) 2pq. 
C) p2 + q2. 
D) 490 AA. 
E) p2 and 490 AA.

Question 10

Parapatric speciation occurs most often

Accepted Answer

A) within in the same home range. 
B) when a population extends across different habitats within the same home range.. 
C) within a group of interbreeding populations. 
D) on either side of geographic barriers. 
E) by polyploidy. 
A) within in the same home range. 
B) when a population extends across different habitats within the same home range.. 
C) within a group of interbreeding populations. 
D) on either side of geographic barriers. 
E) by polyploidy.

Question 11

An insect that exhibits resistance to a pesticide

Accepted Answer

A) developed the resistance in response to the pesticide. 
B) mutated when exposed to the pesticide. 
C) inherited genes that made it resistant to the pesticide. 
D) provides an example of pest resurgence. 
E) is none of these. 
A) developed the resistance in response to the pesticide. 
B) mutated when exposed to the pesticide. 
C) inherited genes that made it resistant to the pesticide. 
D) provides an example of pest resurgence. 
E) is none of these.

Question 12

Which of these statements is true?

Accepted Answer

A) Environment can readily alter some genotypes. 
B) Genotype is manifested in phenotype. 
C) Genetic variation is easier seen than phenotypic variation. 
D) Variation dies with individuals. 
E) Phenotype is seen physically in the genotype. 
A) Environment can readily alter some genotypes. 
B) Genotype is manifested in phenotype. 
C) Genetic variation is easier seen than phenotypic variation. 
D) Variation dies with individuals. 
E) Phenotype is seen physically in the genotype.

Question 13

Selection pressures acting on a population may favor

Accepted Answer

A) individuals at the left end of the range of variation. 
B) individuals at the right end of the range. 
C) extreme individuals at both ends of the range. 
D) the intermediate individuals within the range. 
E) all of these. 
A) individuals at the left end of the range of variation. 
B) individuals at the right end of the range. 
C) extreme individuals at both ends of the range. 
D) the intermediate individuals within the range. 
E) all of these.

Question 14

Hybridization of closely related plant species by doubling the chromosome number always results in

Accepted Answer

A) allopolyploids. 
B) autopolyploids. 
C) infertile hybrids that must reproduce asexually. 
D) inviable hybrids. 
E) hybrids that are similar to only one of their two parents. 
A) allopolyploids. 
B) autopolyploids. 
C) infertile hybrids that must reproduce asexually. 
D) inviable hybrids. 
E) hybrids that are similar to only one of their two parents.

Question 15

The effectiveness of geographic barriers in promoting speciation is related most to

Accepted Answer

A) the size of the barrier. 
B) the inability of the organisms to overcome the barrier. 
C) the speed at which the barrier forms. 
D) how long the barrier exists. 
E) the size of the population it separates. 
A) the size of the barrier. 
B) the inability of the organisms to overcome the barrier. 
C) the speed at which the barrier forms. 
D) how long the barrier exists. 
E) the size of the population it separates.

Question 16

Speciation caused by the separation of the continents is

Accepted Answer

A) divergence. 
B) parapatry. 
C) gene flow. 
D) allopatry. 
E) sympatry. 
A) divergence. 
B) parapatry. 
C) gene flow. 
D) allopatry. 
E) sympatry.

Question 17

The inability of bees to pollinate the flowers of certain sage plants is an example of

Accepted Answer

A) temporal isolation. 
B) hybrid inviability. 
C) mechanical isolation. 
D) gamete mortality. 
E) behavioral isolation. 
A) temporal isolation. 
B) hybrid inviability. 
C) mechanical isolation. 
D) gamete mortality. 
E) behavioral isolation.

Question 18

The impact of natural selection is demonstrated by

Accepted Answer

A) directional selection. 
B) stabilizing selection. 
C) neutral selection. 
D) disruptive selection. 
E) directional selection, stabilizing selection, and disruptive selection. 
A) directional selection. 
B) stabilizing selection. 
C) neutral selection. 
D) disruptive selection. 
E) directional selection, stabilizing selection, and disruptive selection.

Question 19

If the frequency of a recessive allele is 36 percent, the frequency of the dominant allele is what percent?

Accepted Answer

A) 5 
B) 8 
C) 25 
D) 48 
E) 64 
A) 5 
B) 8 
C) 25 
D) 48 
E) 64

Question 20

As the trees in England become less sooty due to pollution controls on factories, which of the following should occur?

Accepted Answer

A) Fewer dark moths should survive. 
B) Numbers of dark and light moths won't change due to stabilizing selection. 
C) Genetic mutations will be reversed. 
D) More light-gray moths should survive. 
E) Fewer dark moths should survive, and more light-gray moths should survive. 
A) Fewer dark moths should survive. 
B) Numbers of dark and light moths won't change due to stabilizing selection. 
C) Genetic mutations will be reversed. 
D) More light-gray moths should survive. 
E) Fewer dark moths should survive, and more light-gray moths should survive.

Exam 18: Emergence of Evolutionary Thought

The genetic equilibrium of a population can be upset by all EXCEPT which of the following?

The difference in the appearance of the male and the female is known as

For sexually reproducing organisms, a species consists of

The maintenance of Hardy-Weinberg equilibrium is predominant

Which of the following is true concerning the hybrids produced by parapatric speciation?

Which of the following is (are) a group of individuals of the same species that occupies a specified area?

The greatest contributor(s) to allopatric isolation is (are)

Which of the following is NOT true about the Hardy-Weinberg formula?

If this population of butterflies is in genetic equilibrium, the frequency of the homozygous dominant genotype in the new generation will be

Parapatric speciation occurs most often

An insect that exhibits resistance to a pesticide

Which of these statements is true?

Selection pressures acting on a population may favor

Hybridization of closely related plant species by doubling the chromosome number always results in

The effectiveness of geographic barriers in promoting speciation is related most to

Speciation caused by the separation of the continents is

The inability of bees to pollinate the flowers of certain sage plants is an example of

The impact of natural selection is demonstrated by

If the frequency of a recessive allele is 36 percent, the frequency of the dominant allele is what percent?

As the trees in England become less sooty due to pollution controls on factories, which of the following should occur?

Invitation to Biology

Lifes Chemical Basis

Molecules of Life

Cell Structure and Function

A Closer Look at Cell Membranes

Ground Rules of Metabolism

Where It Startsphotosynthesis

Energy-Releasing Pathways

How Cells Reproduce

Meiosis and Sexual Reproduction

Observing Patterns in Inherited Traits

Chromosomes and Human Inheritance

Dna Structure and Function

From Dna to Protein

Controls Over Genes

Recombinant Dna and Genetic Engineering

The Macroevolutionary Puzzle

Organizing Information About Species

The Origin and Evolution of Life

Viruses and Prokaryotes

Protists the Simplest Eukaryotes

Plants

Fungi

Animals: the Invertebrates

Animal Evolution the Chordates

Human Evolution: a Case Study

Plant Tissues

Plant Nutrition and Transport

Plant Reproduction

Plant Growth and Development

Animal Tissues and Organ Systems

Neural Control

Sensory Perception

Endocrine Control

Protection, Support, and Movement

Circulation

Immunity

Respiration

Digestion and Human Nutrition

Maintaining the Internal Environment

Animal Reproductive Systems

Animal Development

Animal Behavior

Population Ecology

Community Structure and Biodiversity

Ecosystems

The Biosphere

Human Impacts on the Biosphere

Filters