Biology (from
Greek βιολογος - β?ος,
bios, "
life"; -λογος,
-logos, study of) is the
science that studies living
organisms.
Biology examines the structure, function, growth, origin, evolution, distribution and classification of all living things. Five unifying principles form the foundation of modern biology: cell theory, evolution, gene theory, energy, and homeostasis.[2]
http://en.wikipedia.org/wiki/Biology