JMU BIO 140 CERTIFICATION EVALUATION
QUESTIONS AND CORRECT ANSWERS
PRACTICE PACK
●● This is defined as a proposed explanation for an observation
a) experiment
b) conclusion
c) prediction
d) hypothesis
Answer: d
●● Type of study that tests a hypothesis but does not manipulate any
variables
a) quantitative
b) non-experimental
c) experimental
d) descriptive
Answer: b
●● You want to test the hypothesis that marigolds repel salamanders.
Which of the following studies DOES NOT test this hypothesis.
,a) Find 30 flowerbeds of equal size that have different numbers of
marigolds in them. Count the number of salamanders in each flowerbed
and see if the number of salamanders in each bed is related to the
number of marigolds in each bed
b) Find 30 flower beds on campus and compare the total number of
salamanders in flowerbeds with marigolds vs. beds without marigolds
c) Find 20 identical flowerbeds with salamanders in each. Plant
marigolds in 10 of the flowerbeds and keep the other 10 flowerbeds as
controls. After a month count the number of salamanders remaining in
each type of flowerbed
d) Observe how salamanders react/move when they are close to
marigolds vs. other species of flowers in the flowerbed
e) Find 30 flower beds on campus and count the total number of
salamanders in each flowerbe
Answer: e
●● A scientist wishes to determine the effect of a digestive enzyme on
starch digestion (starch is broken down into glucose). The experimental
setup is to mix the enzyme with starch in a test tube, stop the reaction
after a known period of time, and then measure the amount of glucose
produced.
Which of the following is the correct experimental control?
a) maintaining a constant temperature during the experiment
b) An identical setup but replacing the enzyme with an equal volume of
the same enzyme AFTER it has been inactivated.
, c) Repeating the experiment three more times to control for any
variation in your first experimental trial
d) An identical setup but replacing the enzyme with a different digestive
enzyme
Answer: d
●● You want to test the hypothesis that marigolds repel salamanders.
You design several studies to test this hypothesis. Which of the
following studies would demonstrate that marigolds CAUSE
salamanders to move out of flowerbeds?
a) Observe how salamanders react/move when they are close to
marigolds vs. other species of flowers in the flowerbed
b) Find 30 flower beds on campus and compare the total number of
salamanders in flowerbeds with marigolds vs. beds without marigolds
c) Find 20 identical flowerbeds with salamanders in each. Plant
marigolds in 10 of the flowerbeds and keep the other 10 flowerbeds as
controls. After a month count the number of salamanders remaining in
each type of flowerbed
d) Find 30 flowerbeds of equal size that have different numbers of
marigolds in them. Count the number of salamanders in each flowerbed
and see if the number of salamanders in each bed is related to the
number of marigolds in
Answer: c
QUESTIONS AND CORRECT ANSWERS
PRACTICE PACK
●● This is defined as a proposed explanation for an observation
a) experiment
b) conclusion
c) prediction
d) hypothesis
Answer: d
●● Type of study that tests a hypothesis but does not manipulate any
variables
a) quantitative
b) non-experimental
c) experimental
d) descriptive
Answer: b
●● You want to test the hypothesis that marigolds repel salamanders.
Which of the following studies DOES NOT test this hypothesis.
,a) Find 30 flowerbeds of equal size that have different numbers of
marigolds in them. Count the number of salamanders in each flowerbed
and see if the number of salamanders in each bed is related to the
number of marigolds in each bed
b) Find 30 flower beds on campus and compare the total number of
salamanders in flowerbeds with marigolds vs. beds without marigolds
c) Find 20 identical flowerbeds with salamanders in each. Plant
marigolds in 10 of the flowerbeds and keep the other 10 flowerbeds as
controls. After a month count the number of salamanders remaining in
each type of flowerbed
d) Observe how salamanders react/move when they are close to
marigolds vs. other species of flowers in the flowerbed
e) Find 30 flower beds on campus and count the total number of
salamanders in each flowerbe
Answer: e
●● A scientist wishes to determine the effect of a digestive enzyme on
starch digestion (starch is broken down into glucose). The experimental
setup is to mix the enzyme with starch in a test tube, stop the reaction
after a known period of time, and then measure the amount of glucose
produced.
Which of the following is the correct experimental control?
a) maintaining a constant temperature during the experiment
b) An identical setup but replacing the enzyme with an equal volume of
the same enzyme AFTER it has been inactivated.
, c) Repeating the experiment three more times to control for any
variation in your first experimental trial
d) An identical setup but replacing the enzyme with a different digestive
enzyme
Answer: d
●● You want to test the hypothesis that marigolds repel salamanders.
You design several studies to test this hypothesis. Which of the
following studies would demonstrate that marigolds CAUSE
salamanders to move out of flowerbeds?
a) Observe how salamanders react/move when they are close to
marigolds vs. other species of flowers in the flowerbed
b) Find 30 flower beds on campus and compare the total number of
salamanders in flowerbeds with marigolds vs. beds without marigolds
c) Find 20 identical flowerbeds with salamanders in each. Plant
marigolds in 10 of the flowerbeds and keep the other 10 flowerbeds as
controls. After a month count the number of salamanders remaining in
each type of flowerbed
d) Find 30 flowerbeds of equal size that have different numbers of
marigolds in them. Count the number of salamanders in each flowerbed
and see if the number of salamanders in each bed is related to the
number of marigolds in
Answer: c
