Which of the Following Is NOT a Method by Which

question 14

Multiple Choice

Which of the following is NOT a method by which experimenters control for extraneous variables?

• A) Limited population designs
• B) Random assignment to conditions
• C) Matched group designs
• D) Before after designs

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Definitions:

Radial Cleavage

The pattern of blastomere production in which the cells are located directly above or below one another; characteristic of early deuterostome embryos. Compare with spiral cleavage.

Abdominal Cavity

A body cavity in vertebrates that houses many organs, enclosed by the abdominal muscles and containing the stomach, intestines, liver, and other organs.

Coelom

A fluid-filled body cavity between the intestinal canal and the body wall in most bilateral animals, housing organs.

Pseudocoelom

A body cavity between the mesoderm and endoderm; derived from the blastocoel. Compare with coelom.