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• which reactant will be the best reactant for a nucleophilic aromatic substitution?
  
• diagrams can only be presented as a simple drawing with labels. please select the best answer from the choices provided t f
  
• in response to the soviet union’s invasion of afghanistan, the united states ratified the salt ii treaty. boycotted the 1980 summer olympics. increased grain shipments to afghanistan. stopped sending support to afghanistan.
  
• write two paragraphs to explain how the cold war changed after the 1960s. first, identify the ways it changed during leonid brezhnev's leadership in the 1970s. then, explain how the cold war changed when ronald reagan was in office in the early 1980s. include supporting facts and details from the text in your response.
  
• many of the foods that are already common in our diet are obtained from plant varieties that were developed using conventional genetic techniques of breeding and selection. hybrid corn, nectarines (which are genetically altered peaches), and tangelos (which are a genetic hybrid of a tangerine and grapefruit) are all examples of such breeding and selection. … bioengineered foods and food ingredients (including food additives) must adhere to the same standards of safety under the act that apply to their conventional counterparts. this means that these products must be as safe as the traditional foods in the market. —james h. maryanski, “genetically engineered foods,” statement before the subcommittee on basic research and house committee on science, october 19, 1999 what reasons in this passage support using genetically modified foods?
  
• which type of market is the least likely to have an official currency?closed economycommand economytraditional economymixed market economy
  
• what were two long-term effects of the black death on european society? the nobles in the countryside lost some of their power. trade activities in europe suffered as many people died. merchants, peasants, and craftsmen grew more prosperous. there were no strong kings, and nations collapsed in wars. there was a surplus of labor but no available jobs.
  
• which technologies developed during the 1950s still affect our lives today? check all of the boxes that apply. transistors televisions computers nuclear power vaccines
  
• what was one of kublai khan’s achievements? kublai khan captured the city of baghdad. kublai khan united the tribes of mongolia. kublai khan founded the mongol empire. kublai khan conquered china.
  
• which type of material becomes molten rock at subduction zones? light plates heavy plates continental crust new oceanic crust