Quiz: My Little Bacteria: Friendship Is Magic

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  • Bacteria love you. After all, would they live inside you if they didn't? See if you can guess how many bacteria reside in the average human's gut.

    • Welcome to the human bowel, population 100 trillion! You' d have a hard time digesting your favorite foods without some help from your friendly (intestinal) flora.
    • Welcome to the human bowel, population 100 trillion! You' d have a hard time digesting your favorite foods without some help from your friendly (intestinal) flora.
    • Welcome to the human bowel, population 100 trillion! You' d have a hard time digesting your favorite foods without some help from your friendly (intestinal) flora.
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