<Li> The cell is the fundamental unit of structure and function in all living organisms . </Li> <Li> The activity of an organism depends on the total activity of independent cells . </Li> <Li> Energy flow (metabolism and biochemistry) occurs within cells . </Li> <Li> Cells contain DNA which is found specifically in the chromosome and RNA found in the cell nucleus and cytoplasm . </Li>

Who proposed the cell theory and what does it state