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					| Evolution |  
					| Lecture 8 2/20/98
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					| |  | Last lecture, we discussed the diversity of life, making a quick tour of a number of the important groups | 
 |  | Today we will look at the processes involved in generating that diversity. | 
 |  | Evolution is a process where organisms will change through time | 
 |  | Natural selection is a hypothesis used to explain how evolution can occur. | 
 |  | Evolution by natural selection is not directed | 
 |  | What is the driving force behind evolutionary change | 
 |  | Problems with natural selection | 
 | Mutation and genetic variability | 
 |  | The molecule that genes are composed of | 
 |  | Genes copied during cell division | 
 |  | Genes divided up for sexual reproduction | 
 
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