Ascientist is studying a new chemical he hopes will prevent insects from eating raspberry bushes. he sprays the chemical on a raspberry bush and places it with an unsprayed blackberry bush and some insects in a sealed room. he observes insects eating the blackberry bush, but not the raspberry bush. he concludes that the chemical works. this situation is an example of?

airlines i think? or a cruise boat? does this work out for u? ?

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 . : ) : ) : )