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Anna11 [10]
3 years ago
8

Helpppppp I need help

Biology
1 answer:
asambeis [7]3 years ago
6 0

Answer: D. All variables are measured to provide data for the experimental results

Explanation:

In an experiment, variables are changed from one part of the experiment to another to see the change in effect so option A is incorrect.

Not all variables are changed in experiments. Only independent variables are changed so that their differential effects on the dependent variable is measured. Option B is therefore incorrect.

Not all variables affect the results o the experiment so option C is incorrect as well.

Variables are indeed measured so that data is produced for the results which would enable conclusions to be made so option D is correct.

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