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kiruha [24]
3 years ago
10

10 POINTS!! NEED HELP WITH BIOLOGY

Biology
2 answers:
Georgia [21]3 years ago
8 0
This is only 5 points and 2 is the answer
EastWind [94]3 years ago
6 0
The solution is 1. a controlled experiment can only be aloud to test one variable
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