plant cells undergo photosynthesis to produce glucose, a usable form of chemical energy. the energy produced by plants becomes the base of an energy pyramid. given the situation seen above, what reactant is missing in order for photosynthesis to occur?

Explanation:

For plants to perform photosynthesis they require light energy from the sun, water and carbon dioxide. Water is absorbed from the soil into the cells of roots. The water passes from the root system to the xylem vessels in the stem until it reaches the leaves. Carbon dioxide is absorbed from the atmosphere through pores in the leaves called stomata. The leaves also contain chloroplasts which hold chlorophyll. The sun’s energy is captured by the chlorophyll.

so whats the answer? ?