Imagine two identical plants sitting by a sunny window. One plant is exposed to the sun. The other plant is covered by a cardboard box. The box allows air in and out. The difference between the plants is that the sun can shine on one plant, but the other is in the dark. Both plants are the same temperature. Think about the chemical reactions occurring in the two plants. How would the chemical reactions occurring in the plant grown in the light be different from the chemical reactions in the plant grown in the dark?