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Basile [38]
3 years ago
8

Really need help with this?

Biology
2 answers:
VikaD [51]3 years ago
7 0

Answer: C) Tim did not use a control group

Explanation:

because.....

the whole point of a control group is where comparisons are made in an experiment.

* Hopefully this helps:) Mark me the brainliest:)!!

babymother [125]3 years ago
4 0
i think c too!!!!!!!!!!!!!
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