Question #6422563Single Choice

Biology

Question

A scientist is investigating the effect of caffeine on the heart rate of mice. She divides the mice into two groups: Group A receives a caffeine solution, while Group B receives plain water. Both groups are kept under identical conditions, including the same diet, temperature, and living environment. The heart rates of the mice are measured after one hour.

Why is Group B (the group receiving plain water) included in this experiment?

Options

To serve as the control group for comparison

To test the effects of diet on heart rate

To ensure all mice are exposed to the same environment

To increase the reliability of the caffeine solution

Answer & Analysis

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