Special Experiment

An experiment is done using a special chemical that includes methylene blue, a compound that turns blue in the presence of oxygen. Three test tubes containing various plant cells exposed to different levels of light are observed over 3 days. Each day the test tube was placed in a photospectrometer and the light transmittance were recorded in the following table.

Which of the following is a possible explanation for the percent transmittance reported for Plant Cell 2?

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