Variables in experiments can change, bias can affect outcomes, and metabolism involves an organism's chemical reactions.
Variables: Variables in an experiment are parts that can change, with controlled variables being those that remain constant. The experimental group receives the treatment, while the control group does not.
Bias: Bias refers to personal preferences that are non-scientific and can impact the study's outcome.
Metabolism: Metabolism encompasses all chemical reactions an organism undergoes to maintain life.
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