Ava is five weeks pregnant, and her fetus is beginning to develop three layers that will form the essential human functions. what will the ectoderm layer become over the course of ava's pregnancy? 1. heart, circulatory system, bones, muscles, and reproductive system 2. skin, nervous systems, connective tissue, and eyes 3. lungs, intestines, and bladder 4. hair, fingernails, and eyebrows

Ay i hate cuz my peepee be small

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

When children are young and go to the doctor, the doctor will give them booster shots. this re-exposes the children to a dead portion of a disease to them build immunity.