Base your answer to this question on the diagram below that illustrates the results of a laboratory technique and on your knowledge of biology 1) chromatography 2) manipulation of genes 3) genetic engineering 4) gel electrophoresis

Ronald wants to see if a new shower cleaner works better in removing soap than his old cleaner. he uses the new cleaner on one half of the shower tiles and his old cleaner on the other half. identify the independent and dependent variables in this experiment. enter your answer in the space provided.

Idon’t know the answer and i’ve been stuck on it for a while now skskskskks

How can you tell the difference between rough er from smooth er?