| A | B |
|---|
| Autotroph | organism that can capture energy from sunlight or chemicals and use it to produce its own food from inorganic compounds; also called a producer |
| Heterotroph | organism that obtains energy from the foods it consumes; also called a consumer |
| Adenosine triposphates | one of the principal chemical compounds that living things use to store energy |
| Photosynthesis | process by which plants and some oter organisms use light energy to power reactions that convert water and carbon dioxide into oxygen and high-energy carbohydrates such as sugars an starches |
| Pigment | light absorbing colored molecule |
| Chlorophyll | principal pigment of plants and other photosynthetic organisms; also found in the external skeletons of arthopods |
| Thylakoid | saclike body in chloroplasts made of photosynthetic membranes that contain photosynthesis |
| Stroma | region outside the thylakoid membranes in chloroplasts |
| NADP+ | one of the carrier molecules that transfers high-energy electrons from chlorophyll to other molecules |
| Light-dependent reactions | reactions of photosynthesis that use energy from light to produce ATP and NADPH |
| ATP synthase | allows H+ ions to pass through the cell membrane |
| Calvin cycle | reactions of photosynthesis in which energy from ATP and NADPH is used to build high-energy compounds such as sugars |
