Some flowers have specific pollinators that only visit that particular flower. This phenomenon has developed over a long time period and has involved each species evolving in response to the other. It is called

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.