It is thought that approximately 90% of plant species went extinct during the Carboniferous Period (~320-290 mya). Which of the following graphs represent the changes that likely occurred in carbon dioxide and oxygen levels? (The solid black line depicts CO2 levels, the dashed line represents O2 levels) The left side of the x-axis represents the time of the extinction event. a. graph Lb. graph Hc. graph Kd. graph M

Gold is not now being extracted from seawater. why not? a. it would be too disruptive to marine life to develop any marine mineral resources b. there is no gold in seawater c. we don't know how to extract minerals from seawater d. it would be too costly and difficult to separate the small amount of gold from the very large amounts of halite and other minerals

Jessica finds out that the government introduced a new trade policy that will increase import tariffs. she calls for a meeting of all of the company'sdepartment heads to address this issue, since the new tariffs may increase the company's production costs. what is the purpose of this meeting? o a. operationsb. financec. strategic planningod. marketing

Which statement best explains distribution of natural resources? people tend to settle in locations that have the resources they need for survival. some countries have resources that others lack, so trade between countries becomes vital. fossil fuels come from areas that have mountains and other areas that manufacture synthetic gas. areas with natural resources provide a higher standard of living and better quality of life.