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Chapter 23: Plant Structure and Function

Practice Test
      
  1.The purpose of phloem in plants is to _________.  
  a.   produce a tough covering for plant stems  
  b.   enable the plant to grow  
  c.   transport sugar and organic compounds  
  d.   transport water and minerals  
  Hint    
      
  2.The response of a plant to light stimulus is called __________.  
  a.   phototropism  
  b.   respiration  
  c.   photosynthesis  
  d.   geotropism  
  Hint    
      
  3.Plant hormones, such as __________, affect plant growth by promoting cell elongation.  
  a.   tropisms  
  b.   calcitonin  
  c.   auxins  
  d.   aldosterone  
  Hint    
      
  4.The xylem of angiosperms is made up of fibers and __________.  
  a.   pith  
  b.   vessel elements  
  c.   companion cells  
  d.   cambium  
  Hint    
      
  5.Biennial plants include those that __________.  
  a.   live for several years and periodically produce flowers and seeds  
  b.   live two years and develop large storage roots  
  c.   are herbaceous and live for only a year  
  d.   have a dominant gametophyte generation  
  Hint    
      
  6.The evaporation of water from leaves is called __________.  
  a.   turgor pressure  
  b.   transpiration  
  c.   wilting  
  d.   osmosis  
  Hint    
      
  7.Tiny extensions of single epidermal cells are called _________.  
  a.   endodermis  
  b.   root hairs  
  c.   cortex  
  d.   xylem  
  Hint    
      
  8.Most leaves have a large surface area so they can receive large amounts of ___________.  
  a.   rain  
  b.   sunlight  
  c.   carbon dioxide  
  d.   oxygen  
  Hint    
      
  9.Which of the following plant cells are thin-walled, can carry on photosynthesis and can be used to store food?  
  a.   sclerenchyma  
  b.   xylem  
  c.   parenchyma  
  d.   collenchyma  
  Hint    
      
  10.The vascular bundles of monocot stems are __________.  
  a.   arranged in a star-shaped mass at the center of the root  
  b.   scattered throughout the stem  
  c.   arranged in vascular bundles in the cortex  
  d.   formed in a continuous cylinder between the cortex and the pith  
  Hint    
      
  11.The photosynthetic tissue of the leaf is called __________.  
  a.   epidermis  
  b.   cuticle  
  c.   mesophyll  
  d.   cortex  
  Hint    
      
  12.Growth at the tip of stems and roots is due to cell division in the _________.  
  a.   mesophyll layer  
  b.   apical meristem  
  c.   vascular tissue  
  d.   vascular cambium  
  Hint    
      
  13.The long, tough strands found in celery are made up of what plant cells?  
  a.   parenchyma  
  b.   collenchyma  
  c.   cuticle  
  d.   schlerenchyma  
  Hint    
      
  14.The dermal tissue of a plant provides ____ for the plant.  
  a.   water  
  b.   protection  
  c.   oxygen  
  d.   support  
  Hint    
      
  15.When water enters guard cells, the stomata _________.  
  a.   do not change  
  b.   close  
  c.   cannot carry on gas exchange  
  d.   open  
  Hint    

 
   
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