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7th grade plant chapter

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Question
Answer
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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Created by: dlynns1 on 2007-03-08




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