What can evoke feelings of terror and panic

Scientists who study the anatomy of the systems in the human body focus their studies on

During the first month of development, how many layers of cells make up the embryo? a. 1 b. 2 c. 3 d. 4

Hiv is inactivated in the laboratory after a few minutes of sitting at room temperature, but the flu virus is still active after sitting for several hours. what are the practical consequences of these findings? a) hiv can be transmitted more easily from person to person than the flu virusb) the flu virus can be transmitted more easily from person to person than hivc) this property of hiv makes it more likely to be a pandemic than the flu virusd) disinfecting surfaces is more important to reduce the spread of hiv than the flu