BIOLOGY PRAXIS EXAM STUDY QUIZ
A researcher hypothesizes that lectures do not convey information as well as written
passages in a textbook do. The researcher separates 48 college freshman volunteers
into two groups of 24, with an equal number of males and females in each group. One
group hears a passage repeated three times over a two-minute period. The second
group reads the same passage for two minutes. All test subjects are then asked to write
down as much as they remember of the passage. Which of the following is the
independent variable in the experiment? - Correct Answers -The method by which the
passage is presented to the test subjects
Human skin color, height, and weight depend on the interaction of the products of
multiple genes. These and other polygenic traits typically exhibit - Correct Answers -
continuous variation
Which of the following properties of water is responsible for the solubility of many
molecules in aqueous fluids such as blood and urine? - Correct Answers -The polarity of
water molecules
Which of the following correctly matches a phylum with the most common mode of
excretion by organisms in the phylum? - Correct Answers -Annelida . . metanephridia
Which of the following is the best example of habitat fragmentation? - Correct Answers -
Building a highway though a forest
Which of the following best explains why the body makes a more rapid and stronger
response to an infecting pathogen after vaccination against the pathogen? - Correct
Answers -Memory lymphocytes made in response to the vaccination are activated.
Which of the following enzyme types is most likely responsible for the cleavage of the
plasmid shown above? - Correct Answers -Restriction endonuclease
To study the inheritance of wing size in fruit flies, true-breeding female flies with large
wings were crossed with male flies with miniature wings (Cross 1). The F1 progeny
were then crossed. The reciprocal parental cross (Cross 2) was also performed, and the
F1 progeny were crossed. The crosses and the results are summarized in the table
above. Based on the data, which TWO of the following statements are most likely
correct? - Correct Answers -1.The gene for wing size is sex-linked.
2. The allele for miniature wings is recessive to the allele for large wings.
, Scientists predict that a particular coastal village in Alaska will be underwater by the
year 2025. Which of the following is most likely contributing to the submergence of the
village? - Correct Answers -Global climate change is thinning Arctic sea ice and raising
sea levels
Which of the following plant structures most likely contains sclerenchyma cells? -
Correct Answers -The pericarp of a hazelnut
Which of the following best describes scientific evidence? - Correct Answers -It can be
used to support or reject a hypothesis.
A scientist examining fossils of small rodents at a particular location found fossils of one
species in a deep stratum and found fossils of a similar but distinct more recent species
in the stratum immediately above. Fossils of transitional organisms were not found. Of
the following, which is the best explanation of the observed distribution of fossils in the
strata? - Correct Answers -There was a brief and rapid time of evolutionary change in
the older species, so few fossils of transitional organisms exist.
The graph above shows the population sizes of two species of rodents‚ R and S‚ in a
particular area over time. At the point indicated by the arrow‚ 500 individuals of species
S were released into the area. Population sizes of the two species were monitored over
the next 20 years. Based on the data‚ which of the following conclusions is most likely
correct about the two rodent species in the area? - Correct Answers -Species R and S
occupy different niches.
The molecules of electron transport chains are found in which of the labeled locations of
the organelle represented above? - Correct Answers -C
Which of the following best describes the difference between natural selection and
artificial selection? - Correct Answers -Environmental conditions drive natural selection,
whereas humans determine artificial selection.
Transmissible spongiform encephalopathies (TSE) are a family of neurodegenerative
disorders caused by prions. Prions are infectious misfolded protein sequences that can
enter cells and alter the folding of normal cellular prion proteins. A student claims that
prions are living organisms because they are found in cells, can reproduce, and
respond to the environment. Which of the following statements about prions best refutes
the student's claim? - Correct Answers -Prions have no cellular machinery with which to
carry out metabolism.
In which of the following ways can birds most directly contribute to ecological
succession in a particular area? - Correct Answers -Birds drop seeds in their feces from
plants they have eaten in surrounding areas.
A researcher hypothesizes that lectures do not convey information as well as written
passages in a textbook do. The researcher separates 48 college freshman volunteers
into two groups of 24, with an equal number of males and females in each group. One
group hears a passage repeated three times over a two-minute period. The second
group reads the same passage for two minutes. All test subjects are then asked to write
down as much as they remember of the passage. Which of the following is the
independent variable in the experiment? - Correct Answers -The method by which the
passage is presented to the test subjects
Human skin color, height, and weight depend on the interaction of the products of
multiple genes. These and other polygenic traits typically exhibit - Correct Answers -
continuous variation
Which of the following properties of water is responsible for the solubility of many
molecules in aqueous fluids such as blood and urine? - Correct Answers -The polarity of
water molecules
Which of the following correctly matches a phylum with the most common mode of
excretion by organisms in the phylum? - Correct Answers -Annelida . . metanephridia
Which of the following is the best example of habitat fragmentation? - Correct Answers -
Building a highway though a forest
Which of the following best explains why the body makes a more rapid and stronger
response to an infecting pathogen after vaccination against the pathogen? - Correct
Answers -Memory lymphocytes made in response to the vaccination are activated.
Which of the following enzyme types is most likely responsible for the cleavage of the
plasmid shown above? - Correct Answers -Restriction endonuclease
To study the inheritance of wing size in fruit flies, true-breeding female flies with large
wings were crossed with male flies with miniature wings (Cross 1). The F1 progeny
were then crossed. The reciprocal parental cross (Cross 2) was also performed, and the
F1 progeny were crossed. The crosses and the results are summarized in the table
above. Based on the data, which TWO of the following statements are most likely
correct? - Correct Answers -1.The gene for wing size is sex-linked.
2. The allele for miniature wings is recessive to the allele for large wings.
, Scientists predict that a particular coastal village in Alaska will be underwater by the
year 2025. Which of the following is most likely contributing to the submergence of the
village? - Correct Answers -Global climate change is thinning Arctic sea ice and raising
sea levels
Which of the following plant structures most likely contains sclerenchyma cells? -
Correct Answers -The pericarp of a hazelnut
Which of the following best describes scientific evidence? - Correct Answers -It can be
used to support or reject a hypothesis.
A scientist examining fossils of small rodents at a particular location found fossils of one
species in a deep stratum and found fossils of a similar but distinct more recent species
in the stratum immediately above. Fossils of transitional organisms were not found. Of
the following, which is the best explanation of the observed distribution of fossils in the
strata? - Correct Answers -There was a brief and rapid time of evolutionary change in
the older species, so few fossils of transitional organisms exist.
The graph above shows the population sizes of two species of rodents‚ R and S‚ in a
particular area over time. At the point indicated by the arrow‚ 500 individuals of species
S were released into the area. Population sizes of the two species were monitored over
the next 20 years. Based on the data‚ which of the following conclusions is most likely
correct about the two rodent species in the area? - Correct Answers -Species R and S
occupy different niches.
The molecules of electron transport chains are found in which of the labeled locations of
the organelle represented above? - Correct Answers -C
Which of the following best describes the difference between natural selection and
artificial selection? - Correct Answers -Environmental conditions drive natural selection,
whereas humans determine artificial selection.
Transmissible spongiform encephalopathies (TSE) are a family of neurodegenerative
disorders caused by prions. Prions are infectious misfolded protein sequences that can
enter cells and alter the folding of normal cellular prion proteins. A student claims that
prions are living organisms because they are found in cells, can reproduce, and
respond to the environment. Which of the following statements about prions best refutes
the student's claim? - Correct Answers -Prions have no cellular machinery with which to
carry out metabolism.
In which of the following ways can birds most directly contribute to ecological
succession in a particular area? - Correct Answers -Birds drop seeds in their feces from
plants they have eaten in surrounding areas.
