AP Biology essay prompt help... reproduction

Posted on 2013-11-25 14:08:00 in Biology by ?

studying and I need help with an AP Biology essay prompt for a test i have coming up... heres the prompt: 

Reproduction can be either asexual or sexual 

a. Using a specific example, describe how organisms can reproduce asexually. Discuss two evolutionary advantages of asexual reproduction. 

b. Identify three ways that sexual reproduction increases genetic variability. For each, explain how it increases genetic variation among the offspring. 

c. Discuss two prezygotic isolating mechanisms that prevent hybridization between two species. Include in your discussion an example of each mechanism. 

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