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valkas [14]
4 years ago
6

Controls are defined as _____.

Biology
1 answer:
Gnesinka [82]4 years ago
8 0
D. Things that are kept constant.


Controls are used in an experiment where some variable is being changed. By only changing one thing and keeping the others constant they can make sure that any change in the results is caused by the variable and not the constant, since the constant didn’t change.
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