Biology Praxis Exam Study Quiz Questions with CORRECT Answers
Question:
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 twoIminute
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?
Answer:
The method by which the passage is presented to the test subjects
Question:
Which of the following properties of water is responsible for the solubility of
many molecules in aqueous fluids such as blood and urine?
Answer:
The polarity of water molecules
Question:
Which of the following correctly matches a phylum with the most common mode of
excretion by organisms in the phylum?
Answer:
Annelida.. metanephridia
Question:
Which of the following is the best example of habitat fragmentation?
Answer:
Building a highway though a forest
Question:
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?
Answer:
Memory lymphocytes made in response to the vaccination are activated.
,Question:
Which of the following enzyme types is most likely responsible for the cleavage of
the plasmid shown above?
Answer:
Restriction endonuclease
Question:
To study the inheritance of wing size in fruit flies, truebreeding female
Answer:
1.The gene for wing size is sexlinked.
Question:
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?
Answer:
Global climate change is thinning Arctic sea ice and raising sea levels
Question:
Which of the following plant structures most likely contains sclerenchyma cells?
Answer:
The pericarp of a hazelnut
Question:
Which of the following best describes scientific evidence?
Answer:
It can be used to support or reject a hypothesis.
Question:
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?
Answer:
There was a brief and rapid time of evolutionary change in the older species, so
few fossils of transitional organisms exist.
, Question:
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?
Answer:
Species R and S occupy different niches.
Question:
Which of the following best describes the difference between natural selection and
artificial selection?
Answer:
Environmental conditions drive natural selection, whereas humans determine
artificial selection.
Question:
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?
Answer:
Prions have no cellular machinery with which to carry out metabolism.
Question:
In which of the following ways can birds most directly contribute to ecological
succession in a particular area?
Answer:
Birds drop seeds in their feces from plants they have eaten in surrounding areas.
Question:
Which of the following is a reason why the use of genetically modified organisms
(GMOs) as food crops is controversial?
Answer:
The GMOs may contain new substances that may not be safe for all consumers.
Question:
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 twoIminute
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?
Answer:
The method by which the passage is presented to the test subjects
Question:
Which of the following properties of water is responsible for the solubility of
many molecules in aqueous fluids such as blood and urine?
Answer:
The polarity of water molecules
Question:
Which of the following correctly matches a phylum with the most common mode of
excretion by organisms in the phylum?
Answer:
Annelida.. metanephridia
Question:
Which of the following is the best example of habitat fragmentation?
Answer:
Building a highway though a forest
Question:
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?
Answer:
Memory lymphocytes made in response to the vaccination are activated.
,Question:
Which of the following enzyme types is most likely responsible for the cleavage of
the plasmid shown above?
Answer:
Restriction endonuclease
Question:
To study the inheritance of wing size in fruit flies, truebreeding female
Answer:
1.The gene for wing size is sexlinked.
Question:
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?
Answer:
Global climate change is thinning Arctic sea ice and raising sea levels
Question:
Which of the following plant structures most likely contains sclerenchyma cells?
Answer:
The pericarp of a hazelnut
Question:
Which of the following best describes scientific evidence?
Answer:
It can be used to support or reject a hypothesis.
Question:
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?
Answer:
There was a brief and rapid time of evolutionary change in the older species, so
few fossils of transitional organisms exist.
, Question:
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?
Answer:
Species R and S occupy different niches.
Question:
Which of the following best describes the difference between natural selection and
artificial selection?
Answer:
Environmental conditions drive natural selection, whereas humans determine
artificial selection.
Question:
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?
Answer:
Prions have no cellular machinery with which to carry out metabolism.
Question:
In which of the following ways can birds most directly contribute to ecological
succession in a particular area?
Answer:
Birds drop seeds in their feces from plants they have eaten in surrounding areas.
Question:
Which of the following is a reason why the use of genetically modified organisms
(GMOs) as food crops is controversial?
Answer:
The GMOs may contain new substances that may not be safe for all consumers.
