Sunflowers

Sunflowers

. The Sun sustains all living creatures and plants on Earth. Sunlight is absorbed by green plants where it strikes chlorophyll, giving it the energy to break water molecules apart and energize photosynthesis. Plants thereby use the Sunís energy to live and grow, giving off oxygen as a byproduct, and animals are nourished by eating these plants. Here the eyes of sunflowers turn in unison to follow their life-sustaining star. (Courtesy of Charles E. Rodgers.)

Copyright 2010, Professor Kenneth R. Lang, Tufts University