dottiestwins dottiestwins

03-06-2016
Biology

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Tim does a study to determine whether or not cigarette smoking decreases speed in track runners

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smarties15 smarties15

04-06-2016

Cigarette smoking decreases speed in track runner, due to the fact that their lungs have black spots. Making it harder for them to breathe. And harder to breathe causing slowing in speed.

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