Cincinnati Bio 1082 ACTUAL FINAL EXAM 2026/2027
PREP QUESTIONS COMPLETE ACCURATE EXAM
APPROVED QUESTIONS AND CORRECT VERIFIED
SOLUTIONS WITH DETAILED RATIONALES (100%
CORRECT VERIFIED ANSWERS) LATEST UPDATED
VERSION 2026 EDITION
If the original finches that had been blown over to the Galápagos from
South America had already been genetically different from the parental
population of South American finches, even before adapting to the
Galápagos, this would have been an example of
A. genetic drift.
B. bottleneck effect.
C. founder effect
D. all three of these
E. both A and C
ANSWERS: E. both A and C
The sizes of horns in males of a particular beetle have an interesting
distribution: the highest frequencies are around 15 millimeters and 30
millimeters, with few individuals in between. Based on this observation,
which of the following modes of selection is most likely to be operating
on these horns?
A. Stabilizing selection
B. Directional selection
C. Concentrated selection
D. Disruptive selection
ANSWERS: D. Disruptive selection
,Which of the various species concepts distinguishes two species based
on the degree of genetic exchange between their gene pools?
A. Morphological
B. Ecological
C. Phylogenetic
D. Biological
ANSWERS: D. Biological
You are confronted with a box of preserved grasshoppers of various
species that are new to science and have not been described. Your
assignment is to separate them into species. There is no accompanying
information as to where or when they were collected. Which species
concept will you have to use?
A. Morphological
B. Phylogenetic
C. Ecological
D. Biological
ANSWERS: A. Morphological
Natural selection works _______ on the genotype and______ on the
phenotype.
A. indirectly; directly
B. directly; indirectly
C. directly; not at all
D. directly; directly
ANSWERS: A. indirectly; directly
,All of the following are examples of prezygotic isolating mechanisms
except?
A. Ecological isolation.
B. Temporal isolation.
C. Mechanical incompatibility.
D. Hybrid sterility.
ANSWERS: D. Hybrid sterility.
Two species of frogs belonging to the same genus occasionally mate, but
the offspring fail to develop and hatch. What is the mechanism for
keeping the two frog species separate?
A. The prezygotic barrier called hybrid sterility.
B. Gametic isolation
C. The postzygotic barrier called hybrid breakdown.
D. The postzygotic barrier called hybrid inviability.
ANSWERS: D. The postzygotic barrier called hybrid inviability.
What was Darwin's explanation for the evolution of bright colors and
other apparently useless (and potentially deleterious) but conspicuous
characters in males of many species?
A. Stabilizing selection
B. Genetic drift
C. Sexual selection
D. Gene flow
ANSWERS: C. Sexual selection
, What type of speciation occurs when gene flow is reduced when two
populations of one species become geographically separated from each
other?
A. Sympatric speciation
B. Hybrid zone
C. Reinforcement
D. Allopatric speciation
ANSWERS: D. Allopatric speciation
The most common means of sympatric speciation occurs via
A. geographic barriers.
B. the hawthorn process.
C. disruptive selection.
D. polyploidy.
ANSWERS: D. polyploidy.
Which of these should decline in hybrid zones where reinforcement is
occurring?
A. Hybrid sterility.
B. Gene flow between distinct gene pools.
C. The genetic distinctness of two gene pools.
D. Speciation.
ANSWERS: B. Gene flow between distinct gene pools.
Which of the following statements about the relationship between
genotype and phenotype is true?
A. A given genotype always produces a specific phenotype.
B. Genotypes alone determine all phenotypes.
C. A particular phenotype can be produced by more than one genotype.
D. Dominance makes the study of the genetic basis of natural selection
easy.
ANSWERS: C. A particular phenotype can be produced by more than one
genotype.
PREP QUESTIONS COMPLETE ACCURATE EXAM
APPROVED QUESTIONS AND CORRECT VERIFIED
SOLUTIONS WITH DETAILED RATIONALES (100%
CORRECT VERIFIED ANSWERS) LATEST UPDATED
VERSION 2026 EDITION
If the original finches that had been blown over to the Galápagos from
South America had already been genetically different from the parental
population of South American finches, even before adapting to the
Galápagos, this would have been an example of
A. genetic drift.
B. bottleneck effect.
C. founder effect
D. all three of these
E. both A and C
ANSWERS: E. both A and C
The sizes of horns in males of a particular beetle have an interesting
distribution: the highest frequencies are around 15 millimeters and 30
millimeters, with few individuals in between. Based on this observation,
which of the following modes of selection is most likely to be operating
on these horns?
A. Stabilizing selection
B. Directional selection
C. Concentrated selection
D. Disruptive selection
ANSWERS: D. Disruptive selection
,Which of the various species concepts distinguishes two species based
on the degree of genetic exchange between their gene pools?
A. Morphological
B. Ecological
C. Phylogenetic
D. Biological
ANSWERS: D. Biological
You are confronted with a box of preserved grasshoppers of various
species that are new to science and have not been described. Your
assignment is to separate them into species. There is no accompanying
information as to where or when they were collected. Which species
concept will you have to use?
A. Morphological
B. Phylogenetic
C. Ecological
D. Biological
ANSWERS: A. Morphological
Natural selection works _______ on the genotype and______ on the
phenotype.
A. indirectly; directly
B. directly; indirectly
C. directly; not at all
D. directly; directly
ANSWERS: A. indirectly; directly
,All of the following are examples of prezygotic isolating mechanisms
except?
A. Ecological isolation.
B. Temporal isolation.
C. Mechanical incompatibility.
D. Hybrid sterility.
ANSWERS: D. Hybrid sterility.
Two species of frogs belonging to the same genus occasionally mate, but
the offspring fail to develop and hatch. What is the mechanism for
keeping the two frog species separate?
A. The prezygotic barrier called hybrid sterility.
B. Gametic isolation
C. The postzygotic barrier called hybrid breakdown.
D. The postzygotic barrier called hybrid inviability.
ANSWERS: D. The postzygotic barrier called hybrid inviability.
What was Darwin's explanation for the evolution of bright colors and
other apparently useless (and potentially deleterious) but conspicuous
characters in males of many species?
A. Stabilizing selection
B. Genetic drift
C. Sexual selection
D. Gene flow
ANSWERS: C. Sexual selection
, What type of speciation occurs when gene flow is reduced when two
populations of one species become geographically separated from each
other?
A. Sympatric speciation
B. Hybrid zone
C. Reinforcement
D. Allopatric speciation
ANSWERS: D. Allopatric speciation
The most common means of sympatric speciation occurs via
A. geographic barriers.
B. the hawthorn process.
C. disruptive selection.
D. polyploidy.
ANSWERS: D. polyploidy.
Which of these should decline in hybrid zones where reinforcement is
occurring?
A. Hybrid sterility.
B. Gene flow between distinct gene pools.
C. The genetic distinctness of two gene pools.
D. Speciation.
ANSWERS: B. Gene flow between distinct gene pools.
Which of the following statements about the relationship between
genotype and phenotype is true?
A. A given genotype always produces a specific phenotype.
B. Genotypes alone determine all phenotypes.
C. A particular phenotype can be produced by more than one genotype.
D. Dominance makes the study of the genetic basis of natural selection
easy.
ANSWERS: C. A particular phenotype can be produced by more than one
genotype.
