Biology 1108 Unit 1 EXAM | UPDATED Questions with 100%
Verified Answers
Kennesaw State University • BIOL 1108
Q1: The term "n" refers to the size of a population, that is, the number of individuals in that population. In
general, in a sample of n individuals, the frequency of an allele is: A)the number of occurrences of the allele.
B)the number of occurrences of the allele divided by n. C)the actual value of n D)the number of occurrences
of the allele divided by twice the number of individuals in the sample (2n). E)twice the number of occurrences
of the allele divided by n.
A: D)the number of occurrences of the allele divided by twice the number of individuals in
the sample (2n).
Q2: If a population is not in HardyWeinberg equilibrium, we can conclude that: A)evolution has occurred.
B)natural selection has occurred. C)one of the assumptions of the HardyWeinberg equilibrium has been
violated. D)evolution has occurred because one of the assumptions of the HardyWeinberg equilibrium has
been violated.
A: D)evolution has occurred because one of the assumptions of the HardyWeinberg
equilibrium has been violated.
Q3: The larvae are prey of both parasitoid wasps and birds. Wasps selectively prey on larvae inside the
smallest galls while birds selectively prey on larvae inside the largest galls. The size of the gall made by the
larvae is a heritable trait. Given this information, we can conclude that the trait 'larval gall size' is subject to:
A)balancing selection. B)stabilizing selection. C)directional selection. D)disruptional selection.
E)heterozygote advantage.
A: B)stabilizing selection.
Q4: You find that a wild population of antelope is not in Hardy Weinberg Equilibrium. From this information
alone, can you determine the mechanism of evolution operating on the population? A)Yes B)No
A: B)No
Q5: A population with a novel adaptation has evolved that adaptation. A)False, but only if the population is
under sexual selection B)True C)True, but only if the population is under sexual selection D)False
A: B)True
, Q6: The peppered moth provides a wellknown example of natural selection. The lightcolored form of the
moth was predominant in England before the industrial revolution. In the midnineteenth century, a
darkcolored form appeared. The difference is produced by a dominant allele of one gene. By about 1900,
approximately 90% of the moths around industrial areas were dark colored, whereas lightcolored moths
were still abundant elsewhere. Apparently, birds could readily find the light moths against the sootdarkened
background in industrial areas and therefore were eating more light moths. Recently, use of cleaner fuels
has greatly reduced soot in the landscape, and the darkcolored moths have been disappearing. Should the
two forms of moths be considered separate species?
A: C)No
Q7: Three populations of crickets look very similar, but the males have courtship songs that sound different.
What function would this difference in song likely serve if the populations came in contact? A)a prezygotic
isolating mechanism B)a postzygotic isolating mechanism C)a spatial/geographic reproductive isolating
mechanism D)a gametic reproductive isolating mechanism E)none of the above
A: A)a prezygotic isolating mechanism
Q8: How are two different species most likely to evolve from one ancestral species? A)phylogenetically, due
to heterozygote advantage in hybrids B)sympatrically, due to extensive inbreeding C)sympatrically, by a
point mutation affecting morphology or behavior D)allopatrically, due to extensive inbreeding
E)allopatrically, after the ancestral species has split into two populations
A: E)allopatrically, after the ancestral species has split into two populations
Q9: Which of the following statements is true regarding hybridization? A)Natural selection sometimes acts
against progeny that result from hybridization. B)Hybridization involves the transfer of genetic material
between members of similar species. C)Hybridization can result in fertile offspring. D)Hybridization occurs in
plants more often than in animals. E)All of these choices are correct.
A: E)All of these choices are correct.
Q10: It is thought that polar bears originated from a population of brown bears (Ursus arctos) that became
geographically isolated during a glaciation event that occurred about 150,000 years ago (Lindqvist et al.,
2010). The origin of polar bears was the result of: A)monopatric speciation B)allopatric speciation
C)sympatric speciation D)peripatric speciation E)polypatric speciation
A: B)allopatric speciation
Verified Answers
Kennesaw State University • BIOL 1108
Q1: The term "n" refers to the size of a population, that is, the number of individuals in that population. In
general, in a sample of n individuals, the frequency of an allele is: A)the number of occurrences of the allele.
B)the number of occurrences of the allele divided by n. C)the actual value of n D)the number of occurrences
of the allele divided by twice the number of individuals in the sample (2n). E)twice the number of occurrences
of the allele divided by n.
A: D)the number of occurrences of the allele divided by twice the number of individuals in
the sample (2n).
Q2: If a population is not in HardyWeinberg equilibrium, we can conclude that: A)evolution has occurred.
B)natural selection has occurred. C)one of the assumptions of the HardyWeinberg equilibrium has been
violated. D)evolution has occurred because one of the assumptions of the HardyWeinberg equilibrium has
been violated.
A: D)evolution has occurred because one of the assumptions of the HardyWeinberg
equilibrium has been violated.
Q3: The larvae are prey of both parasitoid wasps and birds. Wasps selectively prey on larvae inside the
smallest galls while birds selectively prey on larvae inside the largest galls. The size of the gall made by the
larvae is a heritable trait. Given this information, we can conclude that the trait 'larval gall size' is subject to:
A)balancing selection. B)stabilizing selection. C)directional selection. D)disruptional selection.
E)heterozygote advantage.
A: B)stabilizing selection.
Q4: You find that a wild population of antelope is not in Hardy Weinberg Equilibrium. From this information
alone, can you determine the mechanism of evolution operating on the population? A)Yes B)No
A: B)No
Q5: A population with a novel adaptation has evolved that adaptation. A)False, but only if the population is
under sexual selection B)True C)True, but only if the population is under sexual selection D)False
A: B)True
, Q6: The peppered moth provides a wellknown example of natural selection. The lightcolored form of the
moth was predominant in England before the industrial revolution. In the midnineteenth century, a
darkcolored form appeared. The difference is produced by a dominant allele of one gene. By about 1900,
approximately 90% of the moths around industrial areas were dark colored, whereas lightcolored moths
were still abundant elsewhere. Apparently, birds could readily find the light moths against the sootdarkened
background in industrial areas and therefore were eating more light moths. Recently, use of cleaner fuels
has greatly reduced soot in the landscape, and the darkcolored moths have been disappearing. Should the
two forms of moths be considered separate species?
A: C)No
Q7: Three populations of crickets look very similar, but the males have courtship songs that sound different.
What function would this difference in song likely serve if the populations came in contact? A)a prezygotic
isolating mechanism B)a postzygotic isolating mechanism C)a spatial/geographic reproductive isolating
mechanism D)a gametic reproductive isolating mechanism E)none of the above
A: A)a prezygotic isolating mechanism
Q8: How are two different species most likely to evolve from one ancestral species? A)phylogenetically, due
to heterozygote advantage in hybrids B)sympatrically, due to extensive inbreeding C)sympatrically, by a
point mutation affecting morphology or behavior D)allopatrically, due to extensive inbreeding
E)allopatrically, after the ancestral species has split into two populations
A: E)allopatrically, after the ancestral species has split into two populations
Q9: Which of the following statements is true regarding hybridization? A)Natural selection sometimes acts
against progeny that result from hybridization. B)Hybridization involves the transfer of genetic material
between members of similar species. C)Hybridization can result in fertile offspring. D)Hybridization occurs in
plants more often than in animals. E)All of these choices are correct.
A: E)All of these choices are correct.
Q10: It is thought that polar bears originated from a population of brown bears (Ursus arctos) that became
geographically isolated during a glaciation event that occurred about 150,000 years ago (Lindqvist et al.,
2010). The origin of polar bears was the result of: A)monopatric speciation B)allopatric speciation
C)sympatric speciation D)peripatric speciation E)polypatric speciation
A: B)allopatric speciation
