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Exam-Biology 1108 Unit 1 EXAM (100% SOLVED)
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Exam-Biology 1108 Unit 1 EXAM (100% SOLVED)
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Exam-Biology 1108 Unit 1 EXAM (100% SOLVED)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. CORRECT ANS-D)the number
of occurrences of the allele divided by twice the number of individuals in the sample (2n).
If a population is not in Hardy-Weinberg equilibrium, we can conclude that:
A)evolution has occurred.
, Exam-Biology 1108 Unit 1 EXAM (100% SOLVED)
B)natural selection has occurred.
C)one of the assumptions of the Hardy-Weinberg equilibrium has been violated.
D)evolution has occurred because one of the assumptions of the Hardy-Weinberg equilibrium
has been violated. CORRECT ANS-D)evolution has occurred because one of the
assumptions of the Hardy-Weinberg equilibrium has been violated.
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.
, Exam-Biology 1108 Unit 1 EXAM (100% SOLVED)
C)directional selection.
D)disruptional selection.
E)heterozygote advantage. CORRECT ANS-B)stabilizing selection.
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 CORRECT ANS-B)No
A population with a novel adaptation has evolved that adaptation.
A)False, but only if the population is under sexual selection
, Exam-Biology 1108 Unit 1 EXAM (100% SOLVED)
B)True
C)True, but only if the population is under sexual selection
D)False CORRECT ANS-B)True
The peppered moth provides a well-known example of natural selection. The light-colored
form of the moth was predominant in England before the industrial revolution. In the mid-
nineteenth century, a dark-colored 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 light-colored moths were still abundant elsewhere. Apparently,
birds could readily find the light moths against the soot-darkened 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 dark-colored moths have been disappearing. Should
the two forms of moths be considered separate species?
A)Yes, because they have completely different coloration.
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