Determine the effect of drug on the blood pressure of rats, Biology

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A scientist wanted to study the effect of a drug on the blood pressure of rats. She set up an experiment in which the experimental group consisted of rats that were injected with a salt solution having the drug. What should the control group have consisted of?

The control group should have having of rats that were injected with the similar type of salt solution but without the drug. The dependent variable was blood pressure, and the independent variable was the drug.

 


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