"you are given the job of developing a drug to give to animals that only targets bacteria. if the drug only targets structures that bacteria have, the animal should not experience any side effects. what structure is the best target? "

The bacteria cell wall

Explanation:

Since the drug targets only the structures that bacteria have, the target structure should be cell wall because human or animal cells do not have cell walls but cell membrane whereas bacteria cells have cell walls. So targeting cell walls would make the drug effective on bacteria while not affecting the animal cell thus there will not be any side effect of the drug on the animal.

we need a diagram to you sorry

question - in 1827, john walker, a druggist in a small english town, tipped a splint with sulphur, chlorate of potash, and sulphid of antimony, and rubbed it on sandpaper, and it burst into flame. the druggist had discovered the first friction-chemical match, the kind we use to-day. it is called friction-chemical because it is made by mixing certain chemicals together and rubbing them. although walker's match did not require the bottle of acid, nevertheless it was not a good one. it could be lighted only by hard rubbing, and it sputtered and threw fire in all directions. in a few years, however, phosphorus was substituted on the tip for antimony, and the change worked wonders. the match could now be lighted with very little rubbing, and it was no longer necessary to have sandpaper upon which to rub it. it would ignite when rubbed on any dry surface, and there was no longer any sputtering. this was the phosphorus match, the match with which we are so familiar. according the paragraph what was the benefit of the new phosphorus match? it burst into flame when rubbed on sandpaper. it was made by mixing chemicals. it could be ignited on any dry surface. it threw fire in all directions.

answer - matches required natural chemicals