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

igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.