Why Is It Important That an Experiment Include a Control

question 1

Multiple Choice

Why is it important that an experiment include a control group?

• A)The control group is the group that the researcher is in control of; it is the group in which the researcher predetermines the nature of the results.
• B)The control group provides a reserve of experimental subjects.
• C)A control group is required for the development of an "if, then" statement.
• D)A control group assures that an experiment will be repeatable.
• E)Without a control group, there is no basis for knowing if a particular result is due to the variable being tested or to some other factor.

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Definitions:

Autonomic Neurons

Nerve cells that control involuntary functions of the body, such as heart rate, digestion, and respiratory rate.

Adrenal Medulla

The inner part of the adrenal gland that secretes adrenaline and noradrenaline, hormones involved in the body's stress response.

Mesoderm

The middle layer of an embryo in early development, from which most of the body's tissues and structures are derived, including muscle, bone, and the circulatory system.

Ectoderm

The outermost of the three primary germ layers in the embryo, giving rise to the nervous system, skin, and various other tissues and organs.