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Chapter 29: Echinoderms and Invertebrate Chordates

Practice Test
      
  1.Which of these echinoderms evolved most recently?  
  a.   sea urchins  
  b.   sea stars  
  c.   brittle stars  
  d.   sea cucumbers  
  Hint    
      
  2.The close relationship between echinoderms and chordates is indicated by their deuterostome development and __________ of their larvae.  
  a.   notochords  
  b.   rays  
  c.   tube feet  
  d.   bilateral symmetry  
  Hint    
      
  3.In seastars, thin-walled tubes that have a suction cup on one end are called ________.  
  a.   tube feet  
  b.   ampullae  
  c.   pedicellarias  
  d.   spines  
  Hint    
      
  4.All adult echinoderms have __________.  
  a.   bilateral symmetry  
  b.   notochords  
  c.   dorsal nerve cords  
  d.   radial symmetry  
  Hint    
      
  5.When moving, a sea star curves up the tips of its rays to detect _______.  
  a.   prey  
  b.   light  
  c.   sound  
  d.   chemicals in the water  
  Hint    
      
  6.There is a good fossil record of echinoderms because they have __________ that easily fossilize.  
  a.   exoskeletons  
  b.   spines  
  c.   endoskeletons  
  d.   tube feet  
  Hint    
      
  7.By comparing the development of echinoderms and chordates, scientists can determine the animals` __________.  
  a.   phylogeny  
  b.   methods of defense  
  c.   feeding methods  
  d.   response to stimuli  
  Hint    
      
  8.The tube feet on sand dollars are modified for __________.  
  a.   excretion and breathing  
  b.   digestion  
  c.   sensing the environment  
  d.   capturing food and breathing  
  Hint    
      
  9.A muscular structure that operates tube feet is called the __________.  
  a.   madreporite  
  b.   ampulla  
  c.   pedicellaria  
  d.   ray  
  Hint    
      
  10.Brittle stars use their tube feet for __________.  
  a.   locomotion  
  b.   reproduction  
  c.   moving particles of food into the mouth in the central disk  
  d.   protection from predators  
  Hint    
      
  11.Sea urchin spines __________.  
  a.   sense the amount of light in the water  
  b.   help capture prey  
  c.   aid in protection, locomotion and burrowing  
  d.   are involved in reproduction  
  Hint    
      
  12.The only sessile echinoderm is a __________.  
  a.   sea cucumber  
  b.   sand dollar  
  c.   sea lily  
  d.   brittle star  
  Hint    
      
  13.The ability of brittle stars to regenerate enables them to survive __________.  
  a.   low tides  
  b.   changes in temperature  
  c.   predators  
  d.   high tides  
  Hint    
      
  14.Humans are more closely related to invertebrate chordates than to echinoderms because they both have __________.  
  a.   five senses  
  b.   gill slits and tails  
  c.   a notochord, gill slits, muscle blocks and a dorsal nerve cord  
  d.   a notochord, gill slits, muscle blocks and a ventral nerve cord  
  Hint    
      
  15.An invertebrate chordate that is a sessile filter feeder is a __________.  
  a.   sea squirt  
  b.   sea cucumber  
  c.   lancelet  
  d.   sea lily  
  Hint    

 
   
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