Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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Most scientists believe that the dinosaurs went extinct due to
Chapter
16
a. | runaway global warming. | d. | a pandemic
disease. | b. | competition from early mammals. | e. | unknown causes. | c. | a meteorite
impact. |
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2.
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The K-Pg boundary layer is evidence of Chapter 16
a. | a crater | d. | dinosaur life. | b. | a meteorite impact. | e. | sedimentary rock. | c. | a period of
planetary cooling |
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3.
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In the Hardy-Weinberg equation,
the term q2 refers to the frequency of
Chapter 17 a. | a recessive allele of a given locus. | d. | the frequency of a heterozygous
genotype at a given locus. | b. | the frequency of a homozygous recessive
genotype at a given locus. | e. | the frequency of a homozygous dominant genotype at a given
locus. | c. | the frequency of all recessive alleles in a
population. |
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4.
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In a population that is in
Hardy-Weinberg equilibrium, the frequency of the homozygous dominant genotype is 0.49. The percentage
of the population that is heterozygous is
Chapter 17
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5.
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The primitive Earth's atmosphere
did NOT contain Chapter 18
a. | free oxygen | d. | water vapor | b. | free nitrogen | e. | inert gases | c. | free
Hydrogen |
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6.
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. Mitochondria arose from
an endosymbiotic relationship between a eukaryotic cell and an aerobic bacteria. Which statement
supports this theory? Chapter 18
a. | Fossilized mitochondria are older than the oldest fossilized
eukaryotes. | d. | A mitochondrion has a only one outer membrane. | b. | Mitochondria can
produce ATP outside of a eukaryotic cell. | e. | A mitochondrion can survive indefinitely when removed from a eukaryotic
cell. | c. | A mitochondrion has its own DNA in the form of a single circular chromosome, like
bacteria. |
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7.
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When a virus takes over the machinery of a cell, it forces the cell to
manufacture
more:
Chaptaer 19
a. | mitochondria for energy for the virus. | d. | viral particles | b. | liposomes to isolate
themselves from water | e. | Golgi
bodies in order to secrete the excess viruses | c. | food particles |
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8.
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Two methods of reproduction are
common for bacteriophages. Which statement best describes the relationship between the two
methods?
Chapter 19 a. | Viral DNA reproduced via the lysogenic pathway eventually enters the lytic
pathway. | d. | The lytic and lysogenic pathways cannot interact in bacteriophage
reproduction. | b. | Viral DNA reproduced via the lytic pathway eventually enters the lysogenic
pathway. | e. | The lytic pathway
is dependent upon the lysogenic pathway for infection. | c. | Viral DNA in the lysogenic pathway immediately
directs the host to reproduce the new viral particles. |
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9.
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The simplest of the eukaryotes
are the: Chapter 20
a. | protistans | d. | animals | b. | plants | e. | Archaea | c. | fungi |
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10.
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All protists have: Chapter 20
a. | chloroplasts only | d. | both nuclei and mitochondria | b. | nuclei
only | e. | chloroplasts, nuclei,
and mitochondria | c. | mitochondria only |
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11.
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Four of the five answers listed below are related by the number of chromosome
sets present. Select the exception. Chapter 21
a. | spores | d. | sperm | b. | sporophyte | e. | gametophyte | c. | egg |
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12.
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The function of xylem is to ____. Chapter 21
a. | conduct water downward in the plant | d. | transfer materials from leaf to
stem | b. | transport food upward in the plant | e. | contain sieve tubes | c. | transport water and
minerals |
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