Chapter 21 Animations    Art 

Unit 3: Genetics Genomes and Their Evolution Review
  1. Genome comparisons can reveal relationships among species.
Chapter 22 Animations    Art 

Unit 4: Mechanisms of Evolution Descent with Modification Review
  1. Charles Darwin explained the diversity of life by through with from a common ancestor.
     
     
     
     
  2. Humans have modified other species over generations by and breeding individuals that possess desired traits. Darwin called this selection.
     
     
     
     
  3. Darwin proposed selection as the mechanism driving evolution. He formed this hypothesis by drawing two based on four .
     
     
     
     
    • Observation #1: Members of a population exhibit in their traits.
       
       
       
       
    • Observation #2: Much of this variation is .
       
       
       
       
    • Observation #3: Most species tend to of offspring.
       
       
       
       
    • Observation #4: Resources are ; many of these offspring do not survive.
       
       
       
       
      • Inference #1 ( selection): Individuals whose inherited traits give them a high probability of surviving ( struggle for ) and are likely to leave more offspring than others:.
         
         
         
         
      • Inference #2 ( ): A population will gradually accumulate favorable characteristics over generations and become more to its environment.
     
     
     
     
  4. Drug resistance in bacteria and viruses such as HIV are probably due to and for individual organisms that possess the resistance.
     
     
     
     
  5. anatomical structures, such as the among mammals, provide evidence of common ancestry with modifications.
     
     
     
     
  6. Comparative reveals anatomical not visible in adults.
     
     
     
     
  7. Unrelated species that occupy similar ecological may look similar by evolution.
     
     
     
     
  8. Darwin's theory of evolution predicts forms during the evolution of species, and this is supported by records.
     
     
     
     
  9. Homologous characteristics derived from a common can be used to establish evolutionary relationships among organisms. 
     
    
 
    
 
    
 
    
 
    
 
    
 
    
 
    
 
    
 
    
 
    
 
    
 
    
 
    
 
    
 
    
 
    
 
    
 
    
 
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