Tree 60 CAD Block

Description

Plants belong to the kingdom Plantae and are mostly multicellular, photosynthetic eukaryotes. The flowering plants, conifers and other gymnosperms, ferns and their associates, hornworts, liverworts, mosses, and the green algae all belong to the clade Viridiplantae (Latin for “green plants”), which excludes the red and brown algae. In the past, all algae and fungus were considered to be part of the kingdom of plants, one of the two kingdoms that included all living creatures other than animals. However, all current classifications of Plantae exclude prokaryotes, certain algae, and fungus (the archaea and bacteria). Green plants need primary chloroplasts, which are produced as a result of an endosymbiotic relationship with cyanobacteria, to photosynthesise most of the energy they receive from the sun. They are green because their chloroplasts contain chlorophylls a and b. Some plants lose their capacity to produce normal levels of chlorophyll or to photosynthesize because they are parasitic or mycotrophic. Although asexual reproduction is also frequent, sexual reproduction and generational alternation are what define plants.