Through mutation, HIV can accumulate resistance to drugs developed for treatment. Describe the relationship between HIV and the humans who develop these drugs in terms of an evolutionary arms race.

The viruses evolve by acquiring new mutations that enable them to escape from the immune system's response to antigens in the host  organism

Explanation:

The vaccines are developed by attenuation or inactivation of the antigens of the pathogen (viruses), thereby mutations enable viral immune escape

explanation:

on disadvantage of hydroelectric power is the cost. another disadvantage of using hydroelectric power is finding a water source powerful enough to harvest hydroelectric power.

what statement best describes the difference between the sympathetic and parasympathetic nervous systems?

the sympathetic nervous system prepares the body for intense physical activity and is often referred to as the fight-or-flight response. the parasympathetic nervous system has almost the exact opposite effect and relaxes the body and inhibits or slows many high energy functions.