This organism pictured belongs to the kingdom Plantae. The kingdom Plantae is composed of land plants (metaphyta), green plants (viridiphyta), and archaeplastida. Green plants use photosynthesis to obtain energy from the sun; however, some other plants are parasitic and have lost their ability to photosynthesize and produce normal amounts of chlorophyll. Plant cells also have chloroplasts and cell walls which are made of cellulose. The great majority of organisms in the kingdom Plantae are seed plants (about 290 thousand out of 315 thousand). Plants provide us with oxygen to breathe, they serve as foods, they are used as decorations, and they are used in the production of medicines/drugs. The scientific study of plants is known as botany.