I have designed an experiment to test the effect of different levels of caffeine
ID: 66512 • Letter: I
Question
I have designed an experiment to test the effect of different levels of caffeine on the heart rate of Daphnia. Which of the following is a good negative control for my experiment?
Question 19 options:
Observing what happens to the heart rate of daphnia right after a large amount or high concentration of caffeine has been added.
Observing what happens to the heart rate of daphnia right after a very small amount of caffeine has been added.
Observing what happens to the heart rate of daphnia without the addition of caffeine.
None of the above.
A)Observing what happens to the heart rate of daphnia right after a large amount or high concentration of caffeine has been added.
B)Observing what happens to the heart rate of daphnia right after a very small amount of caffeine has been added.
C)Observing what happens to the heart rate of daphnia without the addition of caffeine.
D)None of the above.
Explanation / Answer
A negative control does not receive any test or treatment. They get observed in their natural state. So, C .without the addition of caffeine.
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