What is life? Living things are independent bounded physical entities The basic unit of life on Earth is the cell Cells are separated from their environment Cells are in communication with their environment This arrows cells to generate order and organization Multicellular organisms are aggregates of cells Living things possesses the ability to evolve by natural selection To evolve, living things must: Grow and reproduce Have a hereditary system which exhibits cariability Living things are chemical, physical and informational machines They construct their own metabolism This metabolism is used to: Maintain themselves Grow Reproduce Live on earth is based on carbon polymer chemistry The polymers produce nucleic acid information storage … Continue reading Paul Nurse