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Part 9: Populations and Communities Review
  1. A population can grow until it approaches the capacity (K) of the environment. Commercial harvesting aims to obtain maximal yield.
     
     
     
     
  2. Factors affecting population growth include , density, and patterns.
     
     
     
     
  3. A is the way an organism uses resources in its environment. limits an organism from using its entire niche.
     
     
     
     
  4. occurs when one species as a consequence of a relationship with another, and the other species also evolves in response, forming relationships.
     
     
     
     
  5. In predator-prey relationships, the kills and consumes the prey.
     
     
     
     
  6. Predators may be species in their communities. if their predation reduces competitive exclusion by a potential species.
     
     
     
     
  7. Plant defenses against predation include (structural) defenses such as thorns, spines, and prickles, as well as defenses of toxic or distasteful compounds.
     
     
     
     
  8. Animal defenses include coloration, coloration, and Batesian, Müllerian, or mimicry.
     
     
     
     
  9. Community composition may change over time in a process called ecological .
       
       
       
       
    • succession starts with the emergence of a community where no life existed before, progressing towards a community.
       
       
       
       
    • succession occurs after a such as fires, floods, or human activity.
     
     
     
     
  10. increases the stability within an ecosystem. Small ecosystems such as are susceptible to periods of colonization and extinction. 
     
    
 
    
 
    
 
    
 
    
 
    
 
    
 
    
 
    
 
    
 
    
 
    
 
    
 
    
 
    
 
    
 
    
 
    
 
    
 
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