NEET BIOLOGY

Detailed explanation-1: -Controlled variables are ones that could affect the experiment, and the scientist keeps them the same to make it fair.

Detailed explanation-2: -An experiment usually has three kinds of variables: independent, dependent, and controlled. The independent variable is the one that is changed by the scientist. To insure a fair test, a good experiment has only ONE independent variable.

Detailed explanation-3: -A control variable (or scientific constant) in scientific experimentation is an experimental element which is constant (controlled) and unchanged throughout the course of the investigation.

Detailed explanation-4: -To control variables directly, all you need to do is hold them constant throughout a research or experiment (for instance, keeping the temperature constant). To control them indirectly, you can use methods like statistical control.