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• the un predicts that by 2100 the world population will have increased by another 4 billion people. what is the main reason?
  
• which of the following can be reduced by the use of renewable energy sources? a. social costs b. economic costs c. environmental costs d. all of the above
  
• argon is a noble gas. how many electrons would you expect an atom of argon to have in its outer shell?
  
• if a diploid carrot cell has 18 chromosomes how many are in a haploid carrot cell
  
• as biotechnology has improved, scientists are able to look more closely at dna, the molecules that hold genetic instructions for development, reproduction, and functioning. the ability to study dna closely allows scientists to find evidence of genetic mutation and better understand the effects of these changes. think about how genetic mutations can be harmful, beneficial, or cause no change at all.
  
• which statement is the most accurate comparison of william lloyd garrison and frederick douglass?
  
• the graph shows the height of a tree over time. what can you deduce the rate of change to be from 2 years to 4 years ? 2 inch per year 2.5 inches per year 5 inches per year 10 inches per year
  
• how did president roosevelt’s “big stick” policy affect the construction of the panama canal?
  
• members of the house of representatives serve terms that last ___ years, while a senate term lasts ___ years.
  
• read the quote by thomas hobbes. law was brought into the world for nothing else but to limit the natural liberty of particular men in such manner as they might not hurt but assist one another and join together against a common enemy. according to hobbes, what is the primary purpose of the social contract? to protect rights to remove rights to reduce liberty to expand liberty