HIV receptors are not found on the other cell types.
A pre competition meal provides the calories, nutrients, and liquids you need to complete an athletic competition. The meal should give you the energy you need to preform & prevent hunger during the competition
Maybe it was influential, maybe it was peer pressure, maybe it was the need to fit in... there are multiple reason of why teens would want to do drugs or may be at a greater risk of doing drugs.
The answer is B, because muscle endurance let's you do things like running for longer periods of time and muscular strength let's you do things like lift heavy weights.
The control group is usually the group in which none of their variables are changed. This group is used in order to compare it with the outcomes of the other groups.