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In this activity, you'll grow bacteria in four prepared petri dishes. The first petri dish will have a sample swabbed from your unwashed hands. The second petri dish will have a sample swabbed from your hands after washing them with regular soap. The third petri dish will contain another sample from your unwashed hands. The fourth petri dish will contain a sample taken after cleaning your hands with hand sanitizer. What do you think the results will be? Write down your predictions for which samples will show the greatest and least bacteria growth. bacteria: unicellular organisms that sometimes have cell walls but do not have organelles and an organized nucleus
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