The study of life encompasses huge spans of time from contemporary organisms to ancestral life forms stretching back nearly four billion years. The science of biology is fascinating Information explosion during last century. Fascinating discoveries being made daily. Technological advances producing fascinating insights into life. Life uses energy .
Life grows, develops, reproduces.
Life has a genetic program. Living organisms respond to the environment. Life maintains themselves in fluctuating envirnoments - regulation, homeostasis . Life evolves . Unifying Themes -With rapid information flow and new discoveries, biology is in a continuous state of flux.