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Chapter 2: Principles of Ecology

Practice Test
      
  1.The branch of biology that deals with the environment and the interactions of organisms in it is __________.  
  a.   ecology  
  b.   natural history  
  c.   an ecosystem  
  d.   a niche  
  Hint    
      
  2.Abiotic factors in the environment are all __________.  
  a.   the same as dead things  
  b.   living  
  c.   easily measured  
  d.   nonliving  
  Hint    
      
  3.A group of populations that interact in an area is __________.  
  a.   a population  
  b.   a community  
  c.   an ecosystem  
  d.   a biome  
  Hint    
      
  4.Lions, birds, snakes and trees are all __________.  
  a.   part of a niche  
  b.   abiotic factors  
  c.   in the same food chain  
  d.   biotic factors  
  Hint    
      
  5.Grass --> Grasshopper --> Mockingbird represents __________.  
  a.   an ecosystem  
  b.   a food web  
  c.   a food chain  
  d.   a food pyramid  
  Hint    
      
  6.Energy in an ecosystem is used for growth or lost as __________.  
  a.   death  
  b.   light  
  c.   heat  
  d.   biomass  
  Hint    
      
  7.Algae, grasses and trees are all __________.  
  a.   consumers  
  b.   producers  
  c.   decomposers  
  d.   pyramids  
  Hint    
      
  8.Which chemical cycle uses bacteria to fix gases from the air?  
  a.   nitrogen  
  b.   phosphorus  
  c.   carbon  
  d.   water  
  Hint    
      
  9.A trophic level represents a _________.  
  a.   chemical cycle  
  b.   consumer  
  c.   feeding level  
  d.   pyramid  
  Hint    
      
  10.If one organism is closely associated with and survives at the expense of another, a __________ relationship exists.  
  a.   parasitic  
  b.   mutualistic  
  c.   commensalistic  
  d.   herbivore  
  Hint    
      
  11.The portion of Earth that supports life is the __________.  
  a.   biosphere  
  b.   ecosystem  
  c.   individual  
  d.   community  
  Hint    
      
  12.An animal that eats plants and meat is a(n) __________.  
  a.   omnivore  
  b.   herbivore  
  c.   carnivore  
  d.   producer  
  Hint    
      
  13.Organisms that break down organic matter are __________.  
  a.   in the plant kingdom  
  b.   decomposers  
  c.   autotrophs  
  d.   producers  
  Hint    
      
  14.An organism`s role in its community is its __________, and where it lives is its _________.  
  a.   niche; habitat  
  b.   niche; role in the community  
  c.   habitat; niche  
  d.   role in community; niche  
  Hint    
      
  15.Herbivores and carnivores are _________, but plants and algae are __________.  
  a.   animals; consumers  
  b.   consumers; producers  
  c.   omnivores; producers  
  d.   consumers; decomposers  
  Hint    

 
   
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