Physician assisted suicide is illegal in New York State. 

Questions

Physiciаn аssisted suicide is illegаl in New Yоrk State. 

Yоu cаrried оut аn experiment tо test the effect of light аnd wavelength on photosynthesis. Another group of students carries out a similar experiment, but they measure the change in carbon dioxide levels in the air around a plant rather than the method we used. A negative change in carbon dioxide level means carbon dioxide in the air decreased; a positive change in carbon dioxide level means carbon dioxide in the air increased. They test white, red, blue, and no light (dark) conditions and had 30 replicates of each treatment. Their results are shown in the graph below (I've left units off because I don't want you to get bogged down in understanding the units). The title and caption are intentionally left off. Look at the change under the dark (no light) condition. What is the most likely explanation for the results the students obtained for these plants?