<P> Chlorophyll (also chlorophyl) is any of several related green pigments found in cyanobacteria and the chloroplasts of algae and plants . Its name is derived from the Greek words χλωρός, chloros ("green") and φύλλον, phyllon ("leaf"). Chlorophyll is essential in photosynthesis, allowing plants to absorb energy from light . </P> <P> Chlorophylls absorb light most strongly in the blue portion of the electromagnetic spectrum as well as the red portion . Conversely, it is a poor absorber of green and near - green portions of the spectrum, which it reflects, producing the green color of chlorophyll - containing tissues . Two types of chlorophyll exist in the photosystems of green plants: chlorophyll a and b . </P>

Where is most of the chlorophyll in a plant located