Mutation is the sudden change that is occur by exposing cells to the ionized radiation which change the genetic makeup of the cell. Due to mutation, the cell does not perform its normal function like before the mutation so when the mutation occurs in the cell, the genetic or DNA makeup is changed which make the environment unfavorable for the HIV virus and the virus can not cause any infection in the cell.
The process of photosynthesisconverts light energy into stored chemical energy by converting carbon dioxide plus water into sugars plus released oxygen.Cellular respiration releases the energy needed to maintain body temperature despite ongoing energy transfer to the surrounding environment.