...are multicellular eukaryotes and form a clade that includes the flowering plants, conifers and other gymnosperms, ferns, clubmosses, hornworts, liverworts, mosses and the green algae. Green plants have cell walls with cellulose and characteristically obtain most of their energy from sunlight via photosynthesis by primary chloroplasts, derived from endosymbiosis with cyanobacteria. Plants are used as ornaments and, until recently and in great variety, they have served as the source of most medicines. The scientific study of plants is known as botany...
