Im not sure if anyone knows this or not. Can someone please help me with 1 and 2! If u r correct ill mark u was the best answer

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.

What is the one part of the nucleotide  that differs among the other different nucle  tides?

Do fish feel pain? and if they do what pain