BSC1005 Exam 1 questions and answers
graded A+
Which of the following is an appropriate scientific hypothesis? - correct answer ✔✔People
catch colds because of exposure to cold temperature
Why are hypotheses never accepted as proven by scientists? - correct answer ✔✔Alternative
hypotheses might provide a better answer to the research question.
Rudy conducts an experiment to test whether excess dietary salt leads to higher blood pressure.
His results show that the experimental subjects who had excess salt in their diets had higher
blood pressure overall. What should be Rudy's next step? - correct answer ✔✔He should not
reject the hypothesis, but he should conduct additional tests and examine alternative
hypotheses
Mehran heard that drinking a high protein supplement after football training would improve his
muscle mass. To test his hypothesis, the experimental group would receive a high protein drink
and the control group would drink only water. Who should be selected for the control group in
this experiment? - correct answer ✔✔randomly selected teammates in training who are given a
placebo instead of a protein drink
A botanist conducted an experiment to test the effect of light on plants. Fifty plants of a
flowering species were grown for 60 days under different lengths of artificial daylight. Flowers
could be white or pink based on the parent plant genes. The amount of water and fertilizer
provided was constant. At the end of the experiment, the size of each leaf for all plants is
measured. What is the dependent variable in this experiment? - correct answer ✔✔leaf's size
When an experiment has a large sample size, and there is a large difference between the results
in the experimental and control groups, how likely is it that the experimental results are
statistically significant? - correct answer ✔✔very likely
, What does sampling error refer to? - correct answer ✔✔the differences between a group of
experimental subjects and the population as a whole
What does it mean to say that experimental results are peer reviewed? - correct answer ✔✔The
results are analyzed by other scientists before they are published.
Which of the following is a sign that scientific information on a website may be unreliable? -
correct answer ✔✔The site is set up to allow you to buy the product being described.
"Colds are generated by disturbances in psychic energy" is a testable statement. - correct
answer ✔✔false
Which statement is a scientific hypothesis? - correct answer ✔✔Increasing the amount of
protein in a cow's diet increases milk yield.
Why is it impossible to say that the hypothesis that vitamin C prevents colds is proven? - correct
answer ✔✔Alternative hypotheses might be possible.
All hypotheses need to be tested with laboratory experiments. - correct answer ✔✔false
Use the figure to answer the following question. Which substance requires the use of a protein
channel to pass through a plasma membrane? - correct answer ✔✔calcium ions
What kind of molecule forms a bilayer that is the basis for all cellular membranes? - correct
answer ✔✔phospholipid
Which process does not involve molecules moving across cell membranes? - correct answer
✔✔hydrogenation
graded A+
Which of the following is an appropriate scientific hypothesis? - correct answer ✔✔People
catch colds because of exposure to cold temperature
Why are hypotheses never accepted as proven by scientists? - correct answer ✔✔Alternative
hypotheses might provide a better answer to the research question.
Rudy conducts an experiment to test whether excess dietary salt leads to higher blood pressure.
His results show that the experimental subjects who had excess salt in their diets had higher
blood pressure overall. What should be Rudy's next step? - correct answer ✔✔He should not
reject the hypothesis, but he should conduct additional tests and examine alternative
hypotheses
Mehran heard that drinking a high protein supplement after football training would improve his
muscle mass. To test his hypothesis, the experimental group would receive a high protein drink
and the control group would drink only water. Who should be selected for the control group in
this experiment? - correct answer ✔✔randomly selected teammates in training who are given a
placebo instead of a protein drink
A botanist conducted an experiment to test the effect of light on plants. Fifty plants of a
flowering species were grown for 60 days under different lengths of artificial daylight. Flowers
could be white or pink based on the parent plant genes. The amount of water and fertilizer
provided was constant. At the end of the experiment, the size of each leaf for all plants is
measured. What is the dependent variable in this experiment? - correct answer ✔✔leaf's size
When an experiment has a large sample size, and there is a large difference between the results
in the experimental and control groups, how likely is it that the experimental results are
statistically significant? - correct answer ✔✔very likely
, What does sampling error refer to? - correct answer ✔✔the differences between a group of
experimental subjects and the population as a whole
What does it mean to say that experimental results are peer reviewed? - correct answer ✔✔The
results are analyzed by other scientists before they are published.
Which of the following is a sign that scientific information on a website may be unreliable? -
correct answer ✔✔The site is set up to allow you to buy the product being described.
"Colds are generated by disturbances in psychic energy" is a testable statement. - correct
answer ✔✔false
Which statement is a scientific hypothesis? - correct answer ✔✔Increasing the amount of
protein in a cow's diet increases milk yield.
Why is it impossible to say that the hypothesis that vitamin C prevents colds is proven? - correct
answer ✔✔Alternative hypotheses might be possible.
All hypotheses need to be tested with laboratory experiments. - correct answer ✔✔false
Use the figure to answer the following question. Which substance requires the use of a protein
channel to pass through a plasma membrane? - correct answer ✔✔calcium ions
What kind of molecule forms a bilayer that is the basis for all cellular membranes? - correct
answer ✔✔phospholipid
Which process does not involve molecules moving across cell membranes? - correct answer
✔✔hydrogenation
