Chlorophyll, the pigment responsible for the green color ... Understanding the chemistry behind leaf color change can deepen your appreciation for this seasonal spectacle. Carotenoids are always ...

which gives the leaf its green color. This extraordinary chemical absorbs from sunlight the energy that is used in transforming carbon dioxide and water to carbohydrates, such as sugars and starch.

VOICEOVER: Leaves come in all shapes and sizes, depending on the environment they have evolved in.The green of the leaf is the chlorophyll, the pigment that absorbs energy from the sun.

stem and leaf growth, and flowering repeat with little variation in a given species year after year. How is this possible? The explanation came from one of the 20th century’s great discoveries in ...

During photosynthesis a plant absorbs light energy using the pigment chlorophyll ... This glucose is: After a few minutes, the parts of the leaf that contain starch turn the iodine from brown ...