patdisawsome
21.09.2020 •
Biology
Which of the following best describes a controlled experiment? a. An experiment repeated many times to ensure that the results are accurate b. An experiment includes at least two groups, one of which does not receive the experimental treatment c. An experiment that includes one group for which the scientist controls all variables d. An experiment that includes at least two groups, one differing from the other by two or more variables
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Ответ:
c
Explanation:
you need a group to actually have an controlled experiment
Ответ:
The answer is 2.
Step-by-step explanation:
Simple Math.