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Question 1-2
An experiment is designed to test the effect of ultraviolet (UV) light on frogs. Which of the following groups would be the control group?
Frogs exposed to UV light for 30 days
Frogs exposed to UV light for 15 days
Frogs not exposed to UV light
Frogs exposed to UV light for 60 days

Answer

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Answer

$ \boxed{\text{Final Answer: Frogs not exposed to UV light}} $

Steps

Step 1 ：Determine the control group in an experiment testing the effect of ultraviolet (UV) light on frogs.

Step 2 ：The control group should be the group of frogs not exposed to UV light.

Step 3 ：$ \boxed{\text{Final Answer: Frogs not exposed to UV light}} $