| A | B |
|---|
| Photic Zone | Layer of the ocean penetrated by sunlight; depths to 200 meters |
| Photosystems | Clusters of several hundred molecules of chlorophyll where photosynthesis takes place |
| RuBP | Ribulose biphosphate; five carbon chemical that combines with carbon dioxide at the begining of the Calvin Cycle |
| Sink | Body or process that acts as a storage device or disposal mechanism; plants absorb carbon dioxide in photosynthesis |
| Stomata | Pores on the undersides of leaves that can be opened or closed for gas exchange and water loss |
| Stroma | Matrix surrounding the grana in the inner membrane of chloroplast |
| Thylakoid | Specialized structures where photosynthesis occurs; part of chloroplast where light reactions occur |
| Xylem | Part of plants that allow water movement and transportation of nutrients |
