A botanist investigated the effect of atmospheric carbon dioxide (CO2\text{CO}_2CO2) concentration during growth on the stomatal density of Arabidopsis thaliana leaves. Plants were grown in controlled chambers under three different CO2\text{CO}_2CO2 concentrations. The results are shown in the table below.
| CO2\text{CO}_2CO2 concentration during growth (ppm) | Number of stomata per mm2\text{mm}^2mm2 |
|---|---|
| Low (180 ppm180\text{ ppm}180 ppm) | 360, 380, 395, 410, 425 |
| Ambient (400 ppm400\text{ ppm}400 ppm) | 240, 255, 260, 275, 280 |
| High (800 ppm800\text{ ppm}800 ppm) | 140, 150, 155, 165, 175 |
Explain the difference in the number of stomata per mm2\text{mm}^2mm2 on the leaves of plants grown in low CO2\text{CO}_2CO2 conditions compared to those grown in high CO2\text{CO}_2CO2 conditions.
