Which type of mutation affects more genes a gene mutation or a chromosomal mutation?

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's the waste product of electrons and pyruvate combining in fermentation?  

The cell membrane controls what enters and leaves the cell. which of the structures in the diagram below is the cell membrane? — f оооо