front 1 ABC Hypothesis | back 1 A model of flower formation identifying three classes of organ identity genes that direct formation of the four types of floral organs. |
front 2 Blade | back 2 1. The flattened portion of a typical leaf. |
front 3 Cuticle | back 3 A waxy covering on the surface of stems and leaves that prevents desiccation in terrestrial plants. |
front 4 Differentiation | back 4 The process by which a cell or group of cells become specialized in structure and function. |
front 5 Endodermis | back 5 In plant roots, the innermost layer of the cortex that surrounds the vascular cylinder. |
front 6 Ground Tissue System | back 6 Plant tissues that are neither vascular nor dermal, fulfilling a variety of function, such as storage, photosynthesis, and support. |
front 7 Growth | back 7 An irreversible increase in size or biomass. |
front 8 Guard Cells | back 8 Two cells that flank the stomatal pore and regulate the opening and closing of the page. |
front 9 Indeterminate growth | back 9 A type of growth characteristic of plants, in which the organism continues to grow as long as it lives. |
front 10 Internode | back 10 A segment of a plant stem between the points where leaves are attached. |
front 11 Lateral Meristem | back 11 A meristem that thickens the roots and shoots of woody plants. The vascular cambium and cork cambium are lateral meristems. |
front 12 Lateral Root | back 12 A root that rises from the pericycle of an established root. |
front 13 Leaf | back 13 The main photosynthetic organ of vascular plants. |
front 14 Leaf Primordium | back 14 A finger-like projection along the flank of a shoot apical meristem from which a leave arises. |
front 15 Lenticel | back 15 A small raised area in the bark of stems and roots that enables gas exchange between living cells and the outside air. |
front 16 Morphogenesis | back 16 The cellular and tissue-based process by which and animal body takes place. |
front 17 Node | back 17 A point along the stem of a plant at which plants are attached. |
front 18 Organ | back 18 A specialized center of body function composed of several different types of tissues. |
front 19 Pattern formation | back 19 The development of a multicellular organism organism's spatial organization, the arrangement of organs and tissues in their characteristic places in three-dimensional space. |
front 20 Root Cap | back 20 A cone of cells at the tip of a plant root that protects the apical meristem. |
front 21 Root Hair | back 21 A tiny extension of a root epidermal cell, growing just behind the root tip and increasing surface area for absorption of water and minerals. |
front 22 Root System | back 22 All of a plant's roots, which anchor it in the soil, absorb and transport minerals and water, and store food. |
front 23 Stoma | back 23 A microscopic pore surrounded by guard cells in the epidermis of leaves and stems that allows gas exchange between the environment and the interior of the plant. |
front 24 Tissue | back 24 An integrated group of cells with a common structure, function, or both. |
front 25 Vein | back 25 In plants, a vascular bundle in a leaf. |
front 26 Xylem | back 26 Vascular plant tissue consisting mainly of tubular dead cells that conduct most of the water and minerals upward from the roots to the rest of the plant. |