Biological Science (6th Edition)

Published by Benjamin Cummings
ISBN 10: 0321976495
ISBN 13: 978-0-32197-649-9

Chapter 1 - Biology and the Tree of Life - Review - Page 14: 2


When experimental conditions are controlled, all physical conditions, except for one, are identical for all groups tested.

Work Step by Step

During experiments, researchers aim to study a single variable. By keeping the experimental and control group conditions the same, aside from the variable they are studying, they are assured that the outcomes that they find are due to the differences in the manipulated variable.
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