A chemical reaction is a process that leads to the chemical transformation of one set of chemical substances to another. A chemical reaction is usually accompanied by easily observed physical effects, such as the emission of heat and light, the formation of a precipitate, the evolution of gas, or a color change. Photosynthesis is an example from daily life
The role of the T cell is to locate the foreign virus, to produce antibodies, and to signal killer T cells to destroy the foreign object.
hope this helps
This is due to the hydroxyl group in the alcohol which is able to form hydrogen bonds with water molecules.
The answer to your question is c , Natural selection
