<Ul> <Li> Energy flow occurs within cells . </Li> <Li> Heredity information (DNA) is passed on from cell to cell . </Li> <Li> All cells have the same basic chemical composition . </Li> </Ul> <Li> Energy flow occurs within cells . </Li> <Li> Heredity information (DNA) is passed on from cell to cell . </Li> <Li> All cells have the same basic chemical composition . </Li>

Who proposed all cells arise from the preexisting cells explain this statement