(a)[3]
Describe the possible reasons for the increase in atmospheric carbon dioxide.
(b)[6]
Describe and explain how carbon dioxide concentration affects the average photosynthesis rates of the soybean plants from 04:00 to 22:00. Refer to the data in Fig. 2.1 in your answer.
(c)[4]
Complete Table 2.1 by giving two structural features of each of these tissues and explaining how each feature is an adaptation for photosynthesis.
(d)[2]
While the scientists were working in the plot with a carbon dioxide concentration of 550 ppm, their breathing rates were higher than when they worked in the other plot. Suggest why their breathing rates were higher.