Unit 17 Plants
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| biennials | carrot, queen anne's lace, cabbage, and foxglove
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| annuals | corn, geranium, and marigold
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| deciduous | they shed their leaves before winter and produce new stems with new leaves the following spring
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| evergreen | shed their leaves over a long period so that some leaves are always present
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| vascular tissue system | responsible for conduction of various substances including water, dissolved
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| polysaccharide | a carbohydrate consisting of many monosaccharide subunits
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| Hemicelluloses | a group of polysaccharides that are more soluble than cellulose
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| Xylem | conducts water and dissolved nutrient minerals from the roots to the stems and leaves and provides structural support
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| blade | the broad flat portion of a leaf
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| petiole | the stalk that attaches the blade to the stem
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| stipules | leaflike outgrowths usually present in pairs at the base of the petole
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| node | the area of the stem where one or more leaves are attached
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| veins | strands of vascular tissue
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| the cuticle consists primarily of a waxy substances called | cutin
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| the epidermis of many leaves is covered with various hairlike structures called | trichomes
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