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Chapter 23: Plant Structure and Function

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

 
   
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