7.1

Photosynthesis: Photosynthesis is a two-stage process in which energy is harvested from light by pigments, and then transferred to organic compounds. These compounds can be used to synthesise biomass or to provide useful energy for life processes. Photosynthesis takes place in chloroplasts, whose structure enables these stages to take place efficiently. If a requirement for photosynthesis is in short supply, it may act as a limiting factor, preventing the rate of photosynthesis from increasing.