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Chapter 32: Mammals

Practice Test
      
  1.Therapsids had legs that were most like those of __________.  
  a.   birds  
  b.   amphibians  
  c.   mammals  
  d.   reptiles  
  Hint    
      
  2.Mammals can live in every environment on Earth because they are  
  a.   monotremes  
  b.   endotherms  
  c.   ecotherms  
  d.   predators  
  Hint    
      
  3.The organ(s) that helped mammals become successful in protecting developing young from predators was/were __________.  
  a.   teeth  
  b.   claws  
  c.   the uterus  
  d.   legs  
  Hint    
      
  4.Mammals have a higher rate of metabolism necessary for regulation of __________.  
  a.   body temperature  
  b.   breathing  
  c.   locomotion  
  d.   heart rate  
  Hint    
      
  5.Mammals have different kinds of teeth adapted to the type of __________.  
  a.   maternal care given  
  b.   protection needed  
  c.   food eaten  
  d.   locomotion the animal has  
  Hint    
      
  6.A mammal that carries its young inside the uterus until development is almost complete is a __________.  
  a.   bat  
  b.   monotreme  
  c.   marsupial  
  d.   placental  
  Hint    
      
  7.Therapsids had lower jaw and ear bones like those of __________.  
  a.   birds  
  b.   amphibians  
  c.   reptiles  
  d.   mammals  
  Hint    
      
  8.The reason that most marsupials are found in Australia today is because of __________.  
  a.   extinction of dinosaurs  
  b.   continental drift  
  c.   volcanism  
  d.   glaciation  
  Hint    
      
  9.The mammalian brain is folded and has ridges and grooves, giving it __________.  
  a.   memory  
  b.   a high metabolism  
  c.   a large surface area  
  d.   more nerves  
  Hint    
      
  10.Mammals cool off by panting and by means of __________.  
  a.   diaphragms  
  b.   mammary glands  
  c.   thyroid glands  
  d.   sweat glands  
  Hint    
      
  11.When the dinosaurs disappeared, the niches that opened up were filled by __________.  
  a.   amphibians  
  b.   lizards  
  c.   mammals  
  d.   birds  
  Hint    
      
  12.Scientists place mammals into one of three subclasses based on their method of __________.  
  a.   breathing  
  b.   caring for young  
  c.   reproduction  
  d.   feeding  
  Hint    
      
  13.The diaphragm allows the chest cavity to __________.  
  a.   cool down  
  b.   receive oxygen  
  c.   pump blood  
  d.   expand and contract  
  Hint    
      
  14.Mammals that have more than one stomach are __________.  
  a.   marine animals  
  b.   hoofed animals  
  c.   insectivores  
  d.   rodents  
  Hint    
      
  15.The Cenozoic era is called the golden age of __________.  
  a.   dinosaurs  
  b.   mammals  
  c.   fishes  
  d.   amphibians  
  Hint    

 
   
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