An experiment was designed to test the effect of ultraviolet light on the growth of mold spores. A sample of mold spores was div
ided into two groups. The groups were grown under the same conditions, except that group A was exposed only to ultraviolet light and group B was grown in total darkness. What is the purpose of group B being grown in total darkness?
To limit bias
It is the dependent variable
It is the control group
To add an alternative variable
1 answer:
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