How are the petri dish vs. your own body very different environments for bacteria? Like how is it that we can see the bacteria on a petri dish after touching it, yet we can't see the bacteria on our hands with the naked eye?
How are the petri dish vs. your own body very different environments for bacteria? Like how is it that we can see the bacteria on a petri dish after touching it, yet we can't see the bacteria on our hands with the naked eye?
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