Biology, along with other subjects, such as Chemistry, Mathematics, Physics, History, Geography, etc., makes up the basis of Science. Anyone in the world should have a basic understanding of science, since it is one of the main intellectual activities of humankind and it is responsible for a better understanding of this world we live in.
In addition, Biology contains theories and problems related to our own body and that of the animals and plants. This is rather important and interesting for many reasons: pure intellectual knowledge, understanding diseases, environmental protection, knowledge about food, etc.