Which of the Following Is NOT True of Control Variables

question 52

Multiple Choice

Which of the following is NOT true of control variables?

• A)They help define the control group.
• B)They help establish internal validity.
• C)They are essential in experimental designs.
• D)They are kept the same for all participants.

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Definitions:

Coelom

A body cavity in certain animals, including humans, that is lined by an epithelial layer derived from mesoderm, providing space for the development of internal organs.

Bilateral Animals

Animals that possess bilateral symmetry, having a body plan in which the left and right sides mirror each other.

Coelomic Fluid

A fluid found within the coelom, the body cavity of most animals, that serves various functions including circulation and the provision of a hydrostatic skeleton.

Mesoderm

The middle layer of an embryo in multicellular organisms, giving rise to muscles, bones, and the circulatory system among other structures.