click below
click below
Normal Size Small Size show me how
Ch.23 vocab
| Question | Answer |
|---|---|
| A waxy or fatty and watertight layer on the external wall of epidermal cells. | Cuticle |
| One of many openings in a leaf or a stem of a plant that enable gas exchange to occur. | Stoma |
| One of a pair of specialized cells that border a stoma and regulate gas exchange. | Guard cell |
| A conducting system of tissues that transport water and other materials in plant or in animals. | Vascular system |
| The three groups of plants (liverwort, hornworts, and mosses)that lack specialized conducting tissues and true roots, stems, and leaves. | Nonvascular plant |
| A plant embryo that is enclosed in a protective coat. | Seed |
| An organism in an early stage of development of plants and animals; in humans, a developing individual is referred to as an embryo from the second through the eighth week of pregnancy. | Embryo |
| A plant that produces seeds. | Seed Plant |
| The reproductive structure of a flowering plant that usually consists of a pistil, stamens, petals,and sepals. | Flower |
| The tissue that conducts food (sugars, amino acids, and mineral nutrients) in vascular plants. | Phloem |
| Hard-walled cells transport water and mineral nutrients in a kind of tissue. | Xylem |
| The part of a plants body that grows mostly upward. | Shoot |
| In most plants, the part of the body that grows downward. | Root |
| Zones of actively dividing plant cells. | Meristems |
| Hairlike projections | Rhizoids |
| Rhynia, another early seedless vascular plant, also had horizontal underground stems. | Rhizomes |
| Most fern sporophytes have a rhizome that is anchored by roots and leaves. | Fronds |
| Clusters of nongreen spore-bearing leaves. | Cone |
| Are seed plants whose seeds do not develop within a sealed container (a fruit). | Gymnosperms |
| Most seed plants are flowering plants. | Angiosperms |
| Angiosperms produce seeds that develop enclosed within a specialized structure. | Fruit |
| The seeds of angiosperms have a supply of stored food. | Endosperm |
| Flowering plants that produce seeds with one seed leaf(cotyledon). | Monocots |
| Flowering plants that produce seeds with two seed leaves. | Dicots |