Which events help Jack Gilbert’s team understand microbial fingerprints?

In which research method does a researcher change the value of one variable to determine how the change affects another variable? a. experiment b. observational research c. survey d. case study

What federal law makes marijuana illegal i know it's a schedule 1 drug but what law specifically gives the federal government the ability to arrest or fine you over marijuana i have only been able to find info on the scheduling of the drug but it never says this or that is illegal it just says that it's a schedule 1 drug i need the wording exactly my english teacher says that if i don't have it my paper is null and void

Which of the following best completes the graphic organizer above? a. tort