Answers created by Doug L.

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• What is the effect of directional selection on genetic variation?
  
• What is the process of sperm and egg combining called?
  
• How would you determine the number of moles of #N_2# that are required to produce 12 mol of #NH_3# using the equation: #N_2+ 3H_2 -> 2NH_3#?
  
• As the number of effective collisions between reacting particles increases, what happens to the rate of reaction?