<span>The key points about cell theory are as follows: 1. All living organisms are made up of cells; the organisms may be unicellular or multi cellular. 2. The cell is the basic unit of life. 3. New cells are derived from pre-existing cells. 4. All cells maintain homeostasis. Some new facts have been added to these basic facts; the new facts added include the following: (A). Energy flow occur withing all living cells. (B). Hereditary information derived from DNA is passed from cell to cell. (C). All living cells are made up of the same basic chemical compositions.</span>
Plants are autotrophs because they can prepare their own food. Photosynthesis takes place in leaves. Leaves contain stomata that allow for the exchange of gases during the process, and also help with the process of transpiration.