Question #6422564Single 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.

In the caffeine experiment described above, what is the independent variable?

Options

The heart rate of the mice

The type of solution given (caffeine or water)

The temperature of the environment

The diet of the mice

Answer & Analysis

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