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A biology lesson




A biology teacher wished to demonstrate to his students the harmful effects of alcohol on living organisms. For his experiment, he showed them a beaker with pond water in which there was a thriving civilization of worms. When he added some alcohol into the beaker the worms doubled-up and died.

"Now," he said,” what do you learn from this?"

An eager student gave his answer.

"Well the answer is obvious," he said " if you drink alcohol, you'll never have worms."
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