DNA works in many different ways --- through genes that make the stuff of our bodies, through that turn those genes on and off, and through sequences of the DNA that throw those switches. This shows how small differences in can generate enormous change.

bacteria could be both, harmful and to us. harmful bacteria could make us sick and probably even by getting the chances of getting a disease, but good bacteria fight it off with your immune system. there is always bacteria everywhere we go. we need to make sure to wash our hands after using the restroom, before eating, after eating, after petting an animal too. so you see, bacteria is everywhere and is harmful or . i hope this . : ) : ) : )

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