7th grade plant chapter
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| Flap 1 |
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| Flap 2 |
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| cellulose |
chemical compound made by plants out of sugar |
| cuticle |
waxy, protective layer that covers the stems, leaves and flowers of many plants and prevents water loss |
| vascular plant |
plant with tubelike structures that move minerals, water and other substances throughout the plant |
| nonvascular plant |
plant that absorbs water and other substances directly through its cell walls |
| rhizoids |
threadlike structures that anchor nonvascular plants to the ground |
| stomata |
tiny openings in a plants epidermis through which carbon dioxide and water vapor gases enter and leave a leaf |
| guard cell |
pairs of cells that surround stomata and control their openings and closing |
| gymnosperms |
vascular plants that do not flower |
| angiosperms |
flowering vascular plants that produce fruit containing one or more seeds |
| xylem |
vascular tissue that forms hollow vessels that transport substances, other than sugar throughout a plant |
| phloem |
vascular tissue that forms tubes that transport dissolved sugar throughout a plant |
| cambium |
vascular tissue that produces xylem and phloem cells as a plant grows |
| photosynthesis |
food making process that takes place in the chloroplasts of plant cells |
| chlorophyll |
green, light trapping pigment in plant chloroplasts that is important to photosynthesis |
| respiration |
series of chemical reactions used to release energy stored in food molecules |
| auxin |
plant hormone that causes plant leaves and stems to exhibit positive phototropism |
| tropism |
positive or negative plant response to an external stimulus such as touch, light, or gravity |
| photoperiodism |
a plant's response to the lengths of daylight and darkness each day |
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