Kingdom Monera consists of unicellular prokaryotes. They are the most primitive organisms and it is believed that they are the first to evolve among all other organisms. Monerans can be autotrophic like nitrifying bacteria, sulphur bacteria or BGA or hetrotrophic. The hetrotrophic mode exists either as saprophytic decomposers that feed on dead organic matter found in the soil, or as parasitic bacteria that acquire food from a living host, usually causing it harm in the process. Kingdom fungi is made up of the decomposers (they absorb nutrients). Some of the members of this kingdom are fungi, slime molds, yeast, mold, and mushrooms.