Terms : Hide Images
| 455705461 | plasticity | An organism's ability to alter or mold itself in response to local environmental conditions. | 0 | |
| 455705462 | morphology | External form accumulated through natural selection | 1 | |
| 455705463 | tissue | A group of cells with a common function, structure, or both. | 2 | |
| 455705464 | organ | This consists of several types of tissues that together carry out particular functions. | 3 | |
| 455705465 | root system | All of a plant's roots that anchor it in the soil, absorb and transport minerals and water, and store food. | 4 | |
| 455705466 | shoot system | The aerial portion of a plant body consisting of stems, leaves, and flowers. | 5 | |
| 455705467 | root | An organ that anchors a vascular plant, absorbs minerals and water, and often stores organic nutrients. | 6 | |
| 455705468 | taproot system | This system consists of one main vertical root that develops from an embryonic root. | 7 | |
| 455705469 | lateral roots | Formed from the taproot, these roots often stores organic nutrients that the plant consumes during flowering and fruit production. | 8 | |
| 455705470 | fibrous root system | A mat of generally thin roots spreading out below the soil surface. | 9 | |
| 455705471 | adventitious | A term describing any plant part that grows in an unusual location. | 10 | |
| 455705472 | root hair | An extension of a root epidermal cell . | 11 | |
| 455705473 | stem | An organ consisting of an alternate system of nodes. | 12 | |
| 455705474 | nodes | The points at which leaves are attached. | 13 | |
| 455705475 | internodes | The stem segments between nodes. | 14 | |
| 455705476 | auxillary bud | A structure that has the potential to form a lateral shoot. | 15 | |
| 455705477 | terminal bud | Located near the shoot apex, this is also grouped together with developing leaves and a compact series of nodes and internodes. | 16 | |
| 455705478 | apical dominance | Inhibiting the growth of axillary buds. | 17 | |
| 455705479 | leaf | The main photosynthetic organ of most vascular plants | 18 | |
| 455705480 | blade | The flattened portion of a typical leaf. | 19 | |
| 455705481 | petiole | The stalk of a leaf, which joins the leaf to a node of the stem. | 20 | |
| 455705482 | veins | The vascular tissue of leaves. | 21 | |
| 455705483 | tissue system | One or more tissues organized into a functional unit connecting the organs of a plant. | 22 | |
| 455705484 | dermal tissue system | The outer protective covering. | 23 | |
| 455705485 | epidermis | A single layer of tightly packed cells. | 24 | |
| 455705486 | cuticle | A waxy coating that helps prevent water loss, found in the epidermis of leaves and most stems. | 25 | |
| 455705487 | vascular tissue system | This system carries out long distance transport of materials between root and shoots. | 26 | |
| 455705488 | xylem | This conveys water and dissolved materials upward from roots into the shoots. | 27 | |
| 455705489 | phloem | This transports organic nutrients such as sugars from where they are made to where they are needed. | 28 | |
| 455705490 | stele | The vascular tissue of a root or stem. | 29 | |
| 455705491 | vascular cylinder | The central cylinder of vascular tissue in a root. | 30 | |
| 455705492 | vascular bundles | Strands consisting of xylem and phloem. | 31 | |
| 455705493 | ground tissue system | Tissues that are neither dermal nor vascular. | 32 | |
| 455705494 | pith | Ground tissues that is internal to the vascular tissue. | 33 | |
| 455705495 | cortex | Ground tissue that is external to the vascular tissue. | 34 | |
| 455705496 | protoplast | The cell contents exclusive of the cell wall. | 35 | |
| 455705497 | sclerenchyma cells | They specialize in supporting that may dead are at functional maturity, but they produce secondary walls before the protoplast dies. | 36 | |
| 455705498 | sclereids and fibers | Two types of sclerenchyma cells that specialize entirely for support and strengthening | 37 | |
| 455705499 | tracheids and vessel elements | The two types of water-conducting cells that are dead at functional maturity. | 38 | |
| 455705500 | sieve-tube members | Chains of cells that form sieve tubs. | 39 | |
| 455705501 | sieve plates | The end walls between sieve-tube members. | 40 | |
| 455705502 | companion cell | A nonconductive cell that connects to the sieve-tube member by numerous channels. | 41 | |
| 455705503 | indeterminate growth | Growth not limited to a embryonic or juvenile period. Ex: plants. | 42 | |
| 455705504 | determinate growth | Ceasing of growth after reaching a certain size. Ex: most animals and some plant organs. | 43 | |
| 455705505 | annals | A category for flowering plants that complete their life cycle in a single year or less. | 44 | |
| 455705506 | biennials | A category for flowering plants that generally live two years. | 45 | |
| 455705507 | perennials | A category for flowering plants that live many years. | 46 | |
| 455705508 | meristems | Embryonic tissue found in plants that allow indeterminate growth. | 47 | |
| 455705509 | apical meristems | Meristems located at the tips of roots and in the buds that enable the plant to grow in length. | 48 | |
| 455705510 | primary growth | Allows roots to extend through the soil and shoots to increase exposure to light and CO2. | 49 | |
| 455705511 | herbaceous | Nonwoody plants that usually only undergoes primary growth. | 50 | |
| 455705512 | secondary growth | Growth in thickness caused by the activity of lateral meristems | 51 | |
| 455705513 | lateral meristems | Meristems that enable the plant to grow in thickness. | 52 | |
| 455705514 | vascular cambium | A lateral meristem that adds layers of vascular tissue and secondary phloem to the plant. | 53 | |
| 455705515 | cork cambium | A lateral meristem that replaces the epidermis with periderm. | 54 | |
| 455705516 | initials | Cells that remain as sources of new cells. | 55 | |
| 455705517 | derivatices | New cells displaced from the meristem. | 56 | |
| 455705518 | primary plant body | The parts of the root and shoots systems produced by apical meristems. | 57 | |
| 455705519 | root cap | A thimble-like cap that protects the delicate apical meristem as the root pushes through abrasive soil during primary growth. | 58 | |
| 455705520 | zone of cell division | This zone includes the root apical meristem and it s derivatives. New root cells are produced in this region. | 59 | |
| 455705521 | zone of elongation | In this zone, root cells elongate. | 60 | |
| 455705522 | zone of maturation | Zone where the cells complete their differentiation and become functionally mature. | 61 | |
| 455705523 | endodermis | A cylinder one cell thick that forms the boundary with the vascular cylinder. | 62 | |
| 455705524 | pericycle | The outermost cell layer in the vascular cylinder. | 63 | |
| 455705525 | lead primordia | Finger-like projections along the flanks of the apical meristem. | 64 | |
| 455705526 | guard cells | These cells regulate the opening and closing of the pore. | 65 | |
| 455705527 | mesophyll | A region between the upper and lower epidermis. | 66 | |
| 455705528 | palisade mesophyll | One or two more layers of elongated cells on the upper part of the leaf. | 67 | |
| 455705529 | leaf traces | Connections from vascular bundles in the stem that pass through petioles and into leaves. | 68 | |
| 455705530 | bundle sheath | This consists of one or more layers of cells that enclose each vein. | 69 | |
| 455705531 | secondary plant body | Tissues produced by the vascular cambium and cork cambium. | 70 | |
| 455705532 | fusiform initials | These produce elongated cells such as the tracheids, vessel elements, and fibers of the xylem. | 71 | |
| 455705533 | ray initials | These are shorter and oriented perpendicular to the stem or root axis that produce vascular rays. | 72 | |
| 455705534 | heartwood | Layers of the trunk that are closer to the center of a stem or root. | 73 | |
| 455705535 | sapwood | The outer layers that transport xylem sap in the trunk of trees. | 74 | |
| 455705536 | lenticels | Small, raised areas that dot the periderm and enable living cells within a woody stem or root to exchange gases with the outside air. | 75 | |
| 455705537 | bark | All the tissues external to the vascular camium in the tree trunk. | 76 | |
| 455705538 | morphogenesis | The development of body form and organization. | 77 | |
| 455705539 | systems biology | An approach to studying biology that aims to model the dynamic behavior of whole biological systems. | 78 | |
| 455705540 | asymmetrical cell division | One daughter cell receives more cytoplasm than the other is mitosis. | 79 | |
| 455705541 | preprophase band | Microtubules in the cytoplasm that become concentrated into a ring. | 80 | |
| 455705542 | pattern formation | The development of specific structures in specific locations | 81 | |
| 455705543 | positional information | The form of signals that continuously indicate to each cell its location within a developing structure. | 82 | |
| 455705544 | polarity | The condition of having structural differences at opposite ends of an organism. | 83 | |
| 455705545 | phase changes | The morphological changes that arise from transitions in shoot apical meristem activity. | 84 | |
| 455705546 | meristem identity genes | The transition from vegetative growth to flowering is associated with the switching-on of this. | 85 | |
| 455705547 | organ identity genes | Genes that regulate the development of this characteristic floral pattern.They code from transcription factors. | 86 | |
| 455705548 | ABS model | Model that identifies how these genes direct the formation of the four types of floral organs. | 87 |
