Vanessa, a 14 year old female from the Internet asks on October 22, 1999,How does nicotine affect the growth rate of a plant? If you were to put a cigarette in the soil of a plant, would it grow slower or die?
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Nicotine is a defensive chemical MADE by a plant as a defense against insects. It was used as a pesticide for many years before modern chemical pesticides were discovered. This is just an experiment you will have to try. Measure the amounts used, take careful notes and see what happens.
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