| A | B |
| Photosynthesis | the process by which autotrophs (self-feeders) convert water, carbon dioxide, and solar energy. |
| Angiosperm | plants with seeds that are enclosed in an ovary. |
| Gymnosperm | plants with seeds that are not enclosed in an ovary. |
| Vascular plants | plants have leaves, stems, or roots. |
| Nonvascular plants | plants have no leaves, stems, or roots. |
| Leaf | part of a plant that serves primarily as the plant's food-making organ. |
| Root | absorbs and conducts water and dissolved minerals, store food, and anchor the plant in the soil. |
| Stem | portion of vascular plants that commonly bears leaves and buds. It usually is aerial, upright, and elongate, but may be highly modified in structure. |
| Xylem | woody tissue, found in higher plants, that conducts water and inorganic salts throughout the plant and provides it with mechanical support. |
| Phloem | in higher plants, vascular tissue that conducts sugars and other synthesized food materials from the regions of manufacture in the plant to those of consumption and storage. |
| Dicots | the embryo sprouts two cotyledons, which are seed leaves that usually do not become foliage leaves but serve to provide food for the new seedling. |
| Monocot | the embryo sprouts one cotyledon. |
| Stomata | pores open to the outside atmosphere. |
| Germination | The growth of the seed embryo after the period of dormancy and does not take place unless the seed has been transported to a favorable environment by one of the agencies of seed dispersal. |
| Cell Wall | Composed of cellulose it protects the cellular contents and limits a plants cell size. |