The term SIMPLE PLANT can be summarized as a plant that is composed of only one cell or a few cells. An example of this type of plant is an ALGA, which is a single-celled organism that lives in water and uses photosynthesis to produce energy. Algae are found in both freshwater and marine environments and are an important part of the food chain. They are also used in many industries, such as the production of food, pharmaceuticals, and cosmetics.