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Gullett-Bio-Unit2
Bio-Unit2-Plants
| Term | Definition |
|---|---|
| gymnosperm | a wood, vascular seed plant whose seeds are not enclosed by an ovary or fruit |
| angiosperm | a flowering plant that produces seeds within a fruit |
| dermal tissue | the outer covering of a plant |
| ground tissue | the type of plant tissue other than vascular tissue that makes up much of the inside of a plant |
| vascular tissue | the specialized conductive tissue that is found in higher plants that is made up of mostly xylem and phleom |
| xylem | the type of tissue in vascular plants that provides support and conducts water and nutrients from the roots |
| phloem | the type of tissue that conducts food (sugars, amino acids, nutrients) in vascular plants |
| cohesion-tension theory | theory that explains how the physical properties of water allow it to move through the xylem of plants |
| transpiration | the process by which plants release water vapor into the air through stomata |
| pressure-flow model | model for predicting how sugars are transported from photosynthetic tissues to the rest of the plant |
| vascular cylinder | center of a root or stem that contains the vascular tissue |
| primary growth | the growth that occurs as a result of cell division at the tips of stems and roots and gives rise to primary plant tissue |
| secondary growth | growth that results from cell division in the cambia, or lateral meristems, and that cause the stems and roots to thicken |
| blade | the broad, flat portion of a typical leaf |
| petiole | the stalk that attaches a leaf to the plant |
| mesophyll | in leaves, the tissue between epidermal layers, where photosynthesis occurs |
| guard cell | one pair of specialized cells that boarder a stoma and regulate gas exchange |