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Overview of Kingdoms of Life Bacteria (formerly known as Monerans) include two kingdoms Archaebacteria 1. unicellular 2. prokaryotic 3. cell walls do not contain peptidoglycan Eubacteria 1. unicellular organisms 2. prokaryotic—don’t contain a nucleus 3. cell walls contain peptidoglycan 1. contain both autotrophs and heterotrophs 2. earliest life forms on earth 3.5 billion years old Protist 1. contains most unicellular organisms that have a nucleus 2. protists were the first organisms to contain a nucleus 3. contain both autotrophs and heterotrophs 4. they can be motile 5. main difference from monerans is presence of nucleus 6. probably the ancestors of fungi, plants, animals and modern protests Fungi 1. 2. 3. 4. most are multicellular organisms contain mushrooms, molds and mildew have a cell wall made of chitin fungi are heterotrophs Plants 1. most are multicellular 2. most are autotrophs 3. include flowering plants, mosses, ferns and certain algae Animals 1. multicellular organisms 2. have specialized tissues as well as organs and organ systems 3. they are heterotrophs