6. Characteristics of Plants
            a. The Organization of Life (Plant Kingdom)
                i. Eukaryotic organisms
                ii. Manufacture their own food
                    1. photosynthesis
                    2. autotrophs (self-feeding)
            b. Division of Plants
                i. Presence or absence of vascular tissue and Habitat
                    1. Algae: aquatic (marine and fresh water), lack vascular tissue
                    2. Tracheophytes (have vascular tissue = true land plants)
                    3. Bryophytes (mosses and liverworts) do not have vascular tissue (live on land)