This graph plots the rate of photosynthesis as a function of
the concentration of carbon dioxide in a growth chamber where scientists were
able to hold all variables constant while varying the CO2 concentration.
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This graph plots the relationship between photosynthetic
rate and the density of sugar cane plants in a series of field experiments that
varied the plant density.
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This graph plots how heart rate (shown in the pink line- the
one on top) and the cellular lactate concentration depended on cycling speed.
