What country in europe has a federal government

What refers to the existence of more than one level of government in the country

What are objects called that have value in and of themselves as well as value as a means of exchange? custom commodity money currency simple money

Which of the following statements most accurately describes the requirement for the documentation of minors’ assent to participate in research? parents must approve written documentation.documentation is required unless waived by an irb.to protect minors documentation is always required.federal regulations do not require the documentation of minors’ assent.