Biology: The Unity and Diversity of Life (14th Edition)

Published by Brooks/Cole Publishing Co.
ISBN 10: 1305073959
ISBN 13: 978-1-30507-395-1

Chapter 1 - Self-Quiz: 12

Answer

b. The standard against which an experiment group is compared.

Work Step by Step

During an experiment, the variable is not manipulated in the central group, while the variable is manipulated for the variable group. This is done so that the difference between the two groups can be compared and the effect of the variable can be accurately observed.
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