Biology 2nd Edition by Robert Brooker, Eric Widmaier ,Linda Graham ,Peter Stiling

تمرين 3

What is the purpose of using a control group in scientific experiments
A) A control group allows the researcher to practice the experiment first before actually conducting it.
B) A researcher can compare the results in the experimental group and control group to determine if a single variable is causing a particular outcome in the experimental group.
C) A control group provides the framework for the entire experiment so the researcher can recall the procedures that should be conducted.
D) A control group allows the researcher to conduct other experimental changes without disturbing the original experiment.
E) All of the above are correct.