Biology-the study of life. This is such an important subject, and is the most important and useful of the sciences! Everyone should have knowledge of Homeostasis, genetics, evolution, etc. THe class helps you to understand not only how your body works, but it teaches you the earth and its creatures interact. It makes you much more knowledgable, and smarter. Some things from biology I retain to this day, which is very important for whatever you want to do!