A student is studying the metabolic reaction catalyzed by enzyme E: A+B
enzyme E
→ C+D
She runs a series of experiments in which she uses saturated concentrations
of A and B, but varies the concentrations of C and D in the assay medium. Her
results are shown below.

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.

Why do we perceive objects as retaining their brightness under different lighting levels?

Natural selection changes allele frequencies because some survive and reproduce more successfully than others.