Biology in the Laboratory

Inside Other Biotech Labs

What is a control group?

A control group is the experimental group tested without changing the variable. For example, to determine the effect of temperature on seed germination, one group of seeds may be heated to a certain temperature. The researcher will then compare the percent of seeds in this group that germinate and the time it takes them to germinate to another group of seeds (the control group) that have not been heated. All other variables, such as light and water, will remain the same for each group.


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