The choice of whether a particular organism belongs to the experimental group or the control group should be based on ___________.

Question

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The choice of whether an organism belongs to the experimental group or the control group should be based on chance. This ensures that any differences observed between the groups are due to the experimental manipulation and not any pre-existing differences between the groups. Randomization helps to control for variables that may otherwise confound the results of the experiment. Age, size, history or gender may need to be considered in the design of the experiment, but they are not the primary factor determining group assignment.

The Choice of Whether a Particular Organism Belongs to the Experimental