An investigator spill dye on a culture plate and then notices that the bacteria live despite exposure to sunlight. He hypothesize that the dye protects bacteria against death by ultraviolet UV light.
To test this hypothesis, he decides to expose 200 culture plates to UV light.
One hundred plates contain bacteria and dye; the other 100 plates contain only bacteria.
Result; after exposure to UV light, the bacteria on both plates die. Fill in the right hand portion of this diagram.