Biology

19 May, 12:28

What is an independent variable?

A. a variable that is purposefully changed in an experiment

B, a group that matches the experimental group in all aspects, except that the independent variable does not change

C. an uncontrolled variable that could interfere with an experiment

D. a variable that does not change during an experiment

E. a variable that is changed by, or because of, the independent variable

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