The independent variable in this experiment was A - VCE - SSCE Biology - Question 15 - 2012 - Paper 1

In an experimental design, the independent variable is the factor that is manipulated or controlled to test its effects on the dependent variable. In this case, the question is asking about the independent variable relevant to Jonah's experiment.

Among the options given:

• A. Jonah. This option does not represent a condition manipulated in an experiment but rather identifies the subject.
• B. the activity of Jonah. This option reflects an action or behavior that can be manipulated, and thereby influences the outcome of the experiment. Thus, in the context of the experiment, this represents the independent variable.
• C. the room temperature. This is typically considered as a controlled variable rather than an independent one in this specific experiment.
• D. the core body temperature of Jonah. This is likely a dependent variable since it would be measured as an outcome of the independent variable.

Therefore, the correct answer is B. the activity of Jonah.