A group of medical students was tested after a week of final exams. They were found to have a lowered antibody count, indicating a suppressed immune system. Which of the following is correct? a) Their antibody count returned to normal in 48 hours.
b) Within 48 hours they were all sick.
c) They still had a low antibody count two weeks later. d) Two weeks later, they still felt very stressed.

Marcy tests a solution with a strip of blue litmus paper. the paper turns red. the solution is acidic basic neutral

The most effective way to provide children with safety messages is to

How does the principle of federalism affect the u.s. government? a. it guarantees that the united states will always be a representative democracy b. it ensures that the state governments have greater authority that the federal government c. it creates both separate and overlapping powers for the federal and state governments d.it divides the federal and state governments into three branches