Biology is a branch of science that deals with the study of living things. There are diverse forms of
life on earth ranging from the invisible microscopic living things to the gigantic life forms. It aims
at explaining the living world in terms of scientific principles. It is important to note, however, that
living things interact with the non-living things in the environment as well. Biology, therefore also
entails the study of non-living things as well. The role of human beings in shaping the environment
is also investigated in biology. In summary, biology deals with the study of origins, types, nature,
growth, development, interactions and maintenance of all life forms on earth.