a)
Andrea is investigating the effects of light intensity and carbon dioxide concentration on the rate of photosynthesis. She measured the rate of photosynthesis at different light intensities for two identical plants. The plants were placed in closed containers. One container had an initial carbon dioxide concentration of 0.40%. Th e other container had an initial carbon dioxide concentration of 0.03%. She plotted her results as shown below.
Look at the graph. Does an increase in carbon dioxide concentration affect the rate of photosynthesis?
b)
Explain your answer.
